diff --git a/ROADMAP.md b/ROADMAP.md
index eb4bad1..ba31c40 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -45,6 +45,7 @@ DesignCraft aims at full Adobe InDesign parity — and to be better: faster, ope
 - File ▸ Export HTML (`file.exportHtml`): one self-contained page in reading order, styles as CSS, images inline, alt text from Object Export Options (also in EPUB).
 - Swatches panel colour groups (`swatch.newColorGroup`, `moveToGroup`, `ungroupColorGroup`, `renameColorGroup`; folders and a row context menu; IDML ColorGroup).
 - Object ▸ Generate QR Code (`object.qrCode`: web link, text, SMS, email, business card; vector modules as a compound path, into a frame or re-encoded in place).
+- Conditional text (`condition.new/options/delete/apply/list`, Conditional Text panel): hidden conditions drop their text from layout and exports, indicators underline on screen, IDML Condition/AppliedConditions.
 - Drag and drop text editing: drag selected text to move it (Alt copies) with its formatting (`text.release`).
 - Image Import Options: place any page of a multi-page PDF (`file.place {pdfPage}`; the app asks which page), shown on screen and embedded as that page in PDF export.
 - Define Lists: named numbered lists that continue across stories in page order (`list.define`, paragraph `listName` / `startAt`), round-tripped through IDML; `null` in `type.para` / `type.char` now removes an override.
diff --git a/crates/compose/src/cache.rs b/crates/compose/src/cache.rs
index 039e14b..b1c9ea9 100644
--- a/crates/compose/src/cache.rs
+++ b/crates/compose/src/cache.rs
@@ -88,6 +88,12 @@ impl Cache {
             format!("{:?}", doc.footnote_options).hash(&mut h);
             sig.extend([doc.footnote_start(sid) as usize, h.finish() as usize]);
         }
+        // Hidden conditions take their text out of the layout.
+        for (i, c) in doc.conditions.iter().enumerate() {
+            if !c.visible {
+                sig.push(usize::MAX - i);
+            }
+        }
         // Advanced Type sizes super/subscripts.
         let a = doc.settings.advanced_type;
         sig.extend([a.superscript_size, a.superscript_position, a.subscript_size, a.subscript_position].map(|v| v.to_bits() as usize));
diff --git a/crates/compose/src/lib.rs b/crates/compose/src/lib.rs
index a95e83c..bc746f4 100644
--- a/crates/compose/src/lib.rs
+++ b/crates/compose/src/lib.rs
@@ -56,6 +56,8 @@ pub struct RunStyle {
     pub missing_font: bool,
     /// Tracking or manual kerning (Highlight Custom Tracking/Kerning).
     pub custom_tracking: bool,
+    /// The first condition applied (its indicator colour underlines the text on screen).
+    pub condition: Option<String>,
 }
 
 /// An underline or strikethrough bar: its top edge `offset` below the baseline (negative =
@@ -453,6 +455,7 @@ pub fn compose(doc: &Document, story: &Story, frames: &[FrameSpec], opts: &Compo
             page_name: opts.page_name.clone().or_else(|| cur_frame.and_then(|f| f.page_name.clone())),
             section_marker: None,
             vars: var_values,
+            hidden_conditions: doc.conditions.iter().filter(|c| !c.visible).map(|c| c.name.clone()).collect(),
             ..Default::default()
         };
         if !story.objects.is_empty() {
@@ -1501,7 +1504,8 @@ fn place(g: &Glyph, x: f64) -> PlacedGlyph {
         || g.ch == story::INDENT_HERE
         || g.ch == story::RIGHT_INDENT_TAB
         || g.ch == story::TABLE_ANCHOR
-        || g.ch == shape::SOFT_HYPHEN);
+        || g.ch == shape::SOFT_HYPHEN
+        || g.ch == shape::HIDDEN);
     PlacedGlyph {
         face: g.face,
         gid: g.gid,
diff --git a/crates/compose/src/shape.rs b/crates/compose/src/shape.rs
index c60bab8..a2096e4 100644
--- a/crates/compose/src/shape.rs
+++ b/crates/compose/src/shape.rs
@@ -77,8 +77,13 @@ pub struct SubstCtx {
     pub xrefs: HashMap<usize, String>,
     /// Anchored objects by story byte of their mark.
     pub objects: HashMap<usize, ObjectSpec>,
+    /// Conditions currently hidden (conditional text with only these isn't shown).
+    pub hidden_conditions: Vec<String>,
 }
 
+/// The stand-in character of hidden conditional text: no width, no break, not drawn.
+pub const HIDDEN: char = '\u{2060}';
+
 /// Size and placement of an anchored object for line layout.
 #[derive(Clone, Copy, Debug, Default)]
 pub struct ObjectSpec {
@@ -126,6 +131,7 @@ impl StyleTable<'_> {
                 .entry(p.font_family.clone())
                 .or_insert_with(|| !p.font_family.is_empty() && !designcraft_fonts::FontDb::global().has_family(&p.font_family)),
             custom_tracking: p.tracking.abs() > 1e-9 || matches!(p.kerning, designcraft_doc::Kerning::Manual(_)),
+            condition: p.conditions.first().cloned(),
         };
         if let Some(i) = self.styles.iter().rposition(|s| *s == rs) {
             return i as u32;
@@ -186,6 +192,21 @@ pub(crate) fn shape_para(
         };
         let props = styles.resolve_char(para_chars, fmt);
         let style = table.intern(&props);
+        if !props.conditions.is_empty() && props.conditions.iter().all(|c| sub.hidden_conditions.contains(c)) {
+            // Hidden conditional text: zero-width, unbreakable, undrawn place-holders keep every
+            // byte addressable (caret, selection) without taking space.
+            let face = db.face(&props.font_family, &props.font_style);
+            for (i, c) in story.text[a..b].char_indices() {
+                if c == '\n' {
+                    continue;
+                }
+                let mut g = control_glyph(&face, &props, auto_leading, style, a + i, c);
+                g.ch = HIDDEN;
+                (g.ascent, g.descent, g.leading, g.cap, g.xh) = (0.0, 0.0, 0.0, 0.0, 0.0);
+                glyphs.push(g);
+            }
+            continue;
+        }
         if !story.text[a..b].contains(designcraft_doc::FOOTNOTE_REF) {
             shape_run(db, &story.text, a..b, &props, auto_leading, style, sub, &mut glyphs);
             continue;
diff --git a/crates/doc/src/attrs.rs b/crates/doc/src/attrs.rs
index 8ce1646..5945745 100644
--- a/crates/doc/src/attrs.rs
+++ b/crates/doc/src/attrs.rs
@@ -448,6 +448,8 @@ attr_set! {
         language: String = "English: USA".into(),
         /// Additional OpenType features, e.g. `["onum", "ss01"]`.
         otf_features: Vec<String> = Vec::new(),
+        /// Conditional text: the conditions applied (Window › Type & Tables › Conditional Text).
+        conditions: Vec<String> = Vec::new(),
     }
 }
 
diff --git a/crates/doc/src/build.rs b/crates/doc/src/build.rs
index c79541e..a9fcad6 100644
--- a/crates/doc/src/build.rs
+++ b/crates/doc/src/build.rs
@@ -127,6 +127,7 @@ impl Document {
             styles: Arc::new(Styles::default()),
             swatches: designcraft_color::default_swatches(),
             color_groups: vec![],
+            conditions: vec![],
             sections: vec![Section {
                 start: 0,
                 start_number: Some(nd.start_page.max(1)),
diff --git a/crates/doc/src/lib.rs b/crates/doc/src/lib.rs
index 881a6aa..49cdab2 100644
--- a/crates/doc/src/lib.rs
+++ b/crates/doc/src/lib.rs
@@ -131,6 +131,23 @@ impl Default for NumberedList {
     }
 }
 
+/// A conditional-text condition: its indicator colour (screen only) and whether text with it shows.
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Condition {
+    pub name: String,
+    pub color: [u8; 3],
+    pub visible: bool,
+}
+
+impl Document {
+    /// Is text with these conditions hidden? (Conditioned text shows while any of its conditions
+    /// is visible.)
+    pub fn conditions_hide(&self, conds: &[String]) -> bool {
+        !conds.is_empty() && conds.iter().all(|c| self.conditions.iter().any(|x| x.name == *c && !x.visible))
+    }
+}
+
 /// A Swatches panel colour group: a named folder of swatches (by name).
 #[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -305,6 +322,9 @@ pub struct Document {
     /// the top level.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub color_groups: Vec<ColorGroup>,
+    /// Conditional text conditions; text whose conditions are all hidden isn't composed.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub conditions: Vec<Condition>,
     pub sections: Vec<Section>,
     #[serde(default)]
     pub assets: BTreeMap<AssetId, Arc<Asset>>,
diff --git a/crates/engine/src/cmd/conditions.rs b/crates/engine/src/cmd/conditions.rs
new file mode 100644
index 0000000..4744fce
--- /dev/null
+++ b/crates/engine/src/cmd/conditions.rs
@@ -0,0 +1,191 @@
+//! Window › Type & Tables › Conditional Text: conditions, applying them to text, showing and
+//! hiding them.
+
+use std::sync::Arc;
+
+use designcraft_doc::{Condition, Document, Story};
+use serde_json::{Value, json};
+
+use super::{CommandSpec, bad, cmd, has_doc, has_text, ok, str_param};
+
+/// Indicator colours given to new conditions in turn (light, like the Layers panel's).
+const COLORS: [[u8; 3]; 6] = [[79, 153, 255], [255, 79, 79], [79, 255, 79], [255, 179, 79], [179, 79, 255], [79, 230, 230]];
+
+pub fn specs() -> Vec<CommandSpec> {
+    vec![
+        cmd!(query "condition.list", "Conditions", [], None, "{} → [{name, color, visible}]", has_doc, |s, _| {
+            Ok(serde_json::to_value(&s.doc()?.doc.conditions).unwrap_or_default())
+        }),
+        cmd!(
+            "condition.new",
+            "New Condition…",
+            ["Window", "Type & Tables", "Conditional Text"],
+            None,
+            "{name, color?: [r, g, b], visible?} → {name}",
+            has_doc,
+            |s, p| {
+                let name =
+                    str_param(p, "name").map(str::trim).filter(|n| !n.is_empty()).ok_or_else(|| bad("condition.new", "`name` required"))?.to_string();
+                let color = color_param(p);
+                let visible = p.get("visible").and_then(Value::as_bool).unwrap_or(true);
+                s.edit(|d, _| {
+                    if d.conditions.iter().any(|c| c.name == name) {
+                        return Err(bad("condition.new", format!("a condition named `{name}` exists")));
+                    }
+                    let color = color.unwrap_or(COLORS[d.conditions.len() % COLORS.len()]);
+                    d.conditions.push(Condition { name: name.clone(), color, visible });
+                    Ok(json!({"name": name}))
+                })
+            }
+        ),
+        cmd!("condition.options", "Condition Options…", [], None, "{name, to?: new name, color?: [r, g, b], visible?: bool}", has_doc, |s, p| {
+            let name = str_param(p, "name").unwrap_or("").to_string();
+            let to = str_param(p, "to").map(str::trim).filter(|n| !n.is_empty()).map(str::to_string);
+            let color = color_param(p);
+            let visible = p.get("visible").and_then(Value::as_bool);
+            s.edit(|d, _| {
+                if let Some(t) = &to
+                    && *t != name
+                    && d.conditions.iter().any(|c| c.name == *t)
+                {
+                    return Err(bad("condition.options", format!("a condition named `{t}` exists")));
+                }
+                let c = d.conditions.iter_mut().find(|c| c.name == name).ok_or_else(|| bad("condition.options", format!("no condition `{name}`")))?;
+                if let Some(v) = color {
+                    c.color = v;
+                }
+                if let Some(v) = visible {
+                    c.visible = v;
+                }
+                if let Some(t) = to.filter(|t| *t != name) {
+                    c.name = t.clone();
+                    rename_everywhere(d, &name, Some(&t));
+                }
+                ok()
+            })
+        }),
+        cmd!("condition.delete", "Delete Condition", [], None, "{name} — the text it was applied to stays (shown)", has_doc, |s, p| {
+            let name = str_param(p, "name").unwrap_or("").to_string();
+            s.edit(|d, _| {
+                let n = d.conditions.len();
+                d.conditions.retain(|c| c.name != name);
+                if d.conditions.len() == n {
+                    return Err(bad("condition.delete", format!("no condition `{name}`")));
+                }
+                rename_everywhere(d, &name, None);
+                ok()
+            })
+        }),
+        cmd!(
+            "condition.apply",
+            "Apply Condition",
+            [],
+            None,
+            "{name, on?: bool (default true), only?: bool (remove the others)} — to the selected text; `name: null` with `only` removes all",
+            has_text,
+            |s, p| {
+                let name = str_param(p, "name").map(str::to_string);
+                let on = p.get("on").and_then(Value::as_bool).unwrap_or(true);
+                let only = p.get("only").and_then(Value::as_bool).unwrap_or(false);
+                if let Some(n) = &name
+                    && !s.doc()?.doc.conditions.iter().any(|c| c.name == *n)
+                {
+                    return Err(bad("condition.apply", format!("no condition `{n}`")));
+                }
+                let targets = super::text::format_targets(s);
+                s.edit(|d, _| {
+                    for t in &targets {
+                        let Some(st) = d.text_story_mut(t.story, t.cell) else { continue };
+                        if t.range.is_empty() {
+                            continue;
+                        }
+                        st.format_chars(t.range.clone(), |f| {
+                            let mut v = if only { Vec::new() } else { f.over.conditions.clone().unwrap_or_default() };
+                            if let Some(n) = &name {
+                                v.retain(|x| x != n);
+                                if on {
+                                    v.push(n.clone());
+                                }
+                            }
+                            f.over.conditions = if v.is_empty() { None } else { Some(v) };
+                        });
+                    }
+                    ok()
+                })
+            }
+        ),
+    ]
+}
+
+fn color_param(p: &Value) -> Option<[u8; 3]> {
+    let a = p.get("color")?.as_array()?;
+    let c = |i: usize| a.get(i).and_then(Value::as_f64).map(|v| v.clamp(0.0, 255.0) as u8);
+    Some([c(0)?, c(1)?, c(2)?])
+}
+
+/// Rename (or with `None`, remove) a condition in every story's text, table cells included.
+fn rename_everywhere(d: &mut Document, from: &str, to: Option<&str>) {
+    fn fix(st: &mut Story, from: &str, to: Option<&str>) {
+        let len = st.text.len();
+        if st.chars.iter().any(|r| r.format.over.conditions.as_ref().is_some_and(|v| v.iter().any(|x| x == from))) {
+            st.format_chars(0..len, |f| {
+                if let Some(v) = &mut f.over.conditions {
+                    match to {
+                        Some(t) => v.iter_mut().filter(|x| *x == from).for_each(|x| *x = t.to_string()),
+                        None => v.retain(|x| x != from),
+                    }
+                    if v.is_empty() {
+                        f.over.conditions = None;
+                    }
+                }
+            });
+        }
+        for t in st.tables.values_mut() {
+            for c in &mut Arc::make_mut(t).cells {
+                fix(&mut c.text, from, to);
+            }
+        }
+    }
+    for st in d.stories.values_mut() {
+        fix(Arc::make_mut(st), from, to);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use serde_json::json;
+
+    use crate::Session;
+
+    #[test]
+    fn hidden_condition_removes_text_from_the_layout() {
+        let mut s = Session::new();
+        s.execute("file.new", &json!({})).unwrap();
+        let r = s.execute("frame.create", &json!({"rect": [72, 72, 400, 300], "content": "text", "text": "Price: $10 / €9"})).unwrap();
+        let sid = designcraft_doc::StoryId(r["story"].as_u64().unwrap());
+        s.execute("condition.new", &json!({"name": "EU"})).unwrap();
+        let eu = "Price: $10 / ".len();
+        s.execute("text.select", &json!({"story": r["story"], "anchor": eu, "focus": "Price: $10 / €9".len()})).unwrap();
+        s.execute("condition.apply", &json!({"name": "EU"})).unwrap();
+        let end_x = |s: &Session| s.cache.get(&s.doc().unwrap().doc, sid, None).frames[0].lines[0].end_x;
+        let shown = end_x(&s);
+        s.execute("condition.options", &json!({"name": "EU", "visible": false})).unwrap();
+        let hidden = end_x(&s);
+        assert!(hidden < shown - 5.0, "{shown} → {hidden}");
+        // Every byte still has a glyph (caret positions survive).
+        let cs = s.cache.get(&s.doc().unwrap().doc, sid, None);
+        assert!(cs.frames[0].lines[0].glyphs.iter().any(|g| g.byte >= eu && !g.visible));
+        let html = s.execute("file.exportHtml", &json!({})).unwrap()["text"].as_str().unwrap().to_string();
+        assert!(html.contains("$10") && !html.contains("€9"), "hidden text isn't exported");
+        let back = designcraft_idml::import_idml(&designcraft_idml::export_idml(&s.doc().unwrap().doc)).unwrap();
+        assert_eq!(back.conditions, s.doc().unwrap().doc.conditions, "IDML Condition");
+        let bs = back.stories.values().find(|st| st.text.contains("€9")).unwrap();
+        assert!(bs.chars.iter().any(|r| r.format.over.conditions.as_deref() == Some(&["EU".to_string()][..])), "AppliedConditions");
+        s.execute("condition.options", &json!({"name": "EU", "to": "Europe"})).unwrap();
+        let runs = &s.doc().unwrap().doc.stories[&sid].chars;
+        assert!(runs.iter().any(|r| r.format.over.conditions.as_deref() == Some(&["Europe".to_string()][..])));
+        s.execute("condition.delete", &json!({"name": "Europe"})).unwrap();
+        assert!((end_x(&s) - shown).abs() < 0.01, "text shows again");
+        assert!(s.doc().unwrap().doc.stories[&sid].chars.iter().all(|r| r.format.over.conditions.is_none()));
+    }
+}
diff --git a/crates/engine/src/cmd/mod.rs b/crates/engine/src/cmd/mod.rs
index a012a95..5c3ceb4 100644
--- a/crates/engine/src/cmd/mod.rs
+++ b/crates/engine/src/cmd/mod.rs
@@ -3,6 +3,7 @@
 mod anchored;
 pub mod anchors;
 mod captions;
+mod conditions;
 mod datamerge;
 mod edit;
 mod export;
@@ -136,6 +137,7 @@ pub fn command_specs() -> &'static [CommandSpec] {
         v.extend(anchors::specs());
         v.extend(paths::specs());
         v.extend(captions::specs());
+        v.extend(conditions::specs());
         v.extend(lists::specs());
         v.extend(path_type::specs());
         v.extend(qr::specs());
diff --git a/crates/engine/src/cmd/text.rs b/crates/engine/src/cmd/text.rs
index cd3dfa1..b37f07c 100644
--- a/crates/engine/src/cmd/text.rs
+++ b/crates/engine/src/cmd/text.rs
@@ -496,7 +496,7 @@ pub(crate) struct Target {
 
 /// Ranges and stories a formatting command applies to: selected table cells (whole cells), the
 /// text selection, or whole stories of the selected text frames.
-fn format_targets(s: &Session) -> Vec<Target> {
+pub(crate) fn format_targets(s: &Session) -> Vec<Target> {
     let Some(st) = s.active() else { return vec![] };
     if let Some(ts) = st.selection.cells
         && let Some(t) = st.doc.story(ts.story).and_then(|x| x.tables.get(&ts.table))
diff --git a/crates/epub/src/lib.rs b/crates/epub/src/lib.rs
index 6662ec5..ed6eb55 100644
--- a/crates/epub/src/lib.rs
+++ b/crates/epub/src/lib.rs
@@ -221,6 +221,10 @@ pub fn story_html(doc: &Document, sid: StoryId) -> String {
             if a >= b {
                 continue;
             }
+            // Hidden conditional text isn't exported.
+            if f.over.conditions.as_deref().is_some_and(|c| doc.conditions_hide(c)) {
+                continue;
+            }
             let raw = &st.text[a..b];
             let t = if raw.chars().any(|c| designcraft_doc::vars::var_index(c).is_some()) {
                 let sub: String = raw
diff --git a/crates/idml/src/export.rs b/crates/idml/src/export.rs
index b86d13d..3f7c07b 100644
--- a/crates/idml/src/export.rs
+++ b/crates/idml/src/export.rs
@@ -287,6 +287,17 @@ impl<'a> Ex<'a> {
                 .attr("ContinueNumbersAcrossDocuments", "false"),
         );
         root.push(El::new("idPkg:Preferences").attr("src", "Resources/Preferences.xml"));
+        for c in &d.conditions {
+            root.push(
+                El::new("Condition")
+                    .attr("Self", format!("Condition/{}", escape_id(&c.name)))
+                    .attr("Name", &c.name)
+                    .attr("IndicatorColor", format!("{} {} {}", c.color[0], c.color[1], c.color[2]))
+                    .attr("IndicatorMethod", "UseUnderline")
+                    .attr("UnderlineIndicatorAppearance", "Solid")
+                    .attr("Visible", bool_s(c.visible)),
+            );
+        }
         // Variables InDesign's cross-reference page/chapter blocks rely on.
         for (name, ty) in [("XRefChapterNumber", "XrefChapterNumberType"), ("XRefPageNumber", "XrefPageNumberType")] {
             let n = format!("<?AID 001b?>TV {name}");
@@ -997,6 +1008,9 @@ impl<'a> Ex<'a> {
         if let Some(v) = a.no_break {
             el.set("NoBreak", bool_s(v));
         }
+        if let Some(list) = &a.conditions {
+            el.set("AppliedConditions", list.iter().map(|c| format!("Condition/{}", escape_id(c))).collect::<Vec<_>>().join(" "));
+        }
         if let Some(v) = &a.language {
             el.set("AppliedLanguage", format!("$ID/{v}"));
         }
diff --git a/crates/idml/src/import.rs b/crates/idml/src/import.rs
index 7c59af2..39b4677 100644
--- a/crates/idml/src/import.rs
+++ b/crates/idml/src/import.rs
@@ -98,6 +98,8 @@ struct Importer<'r> {
     /// Unnamed swatches (gradients) added on first use.
     hidden_swatches: HashMap<String, Swatch>,
     color_groups: Vec<designcraft_doc::ColorGroup>,
+    conditions: Vec<designcraft_doc::Condition>,
+    condition_names: HashMap<String, String>,
     styles: Styles,
     para_names: HashMap<String, String>,
     char_names: HashMap<String, String>,
@@ -177,6 +179,8 @@ impl<'r> Importer<'r> {
             hidden_colors: HashMap::new(),
             hidden_swatches: HashMap::new(),
             color_groups: Vec::new(),
+            conditions: Vec::new(),
+            condition_names: HashMap::new(),
             styles,
             para_names: HashMap::new(),
             char_names: HashMap::new(),
@@ -618,6 +622,20 @@ impl<'r> Importer<'r> {
     // ---------- styles ----------
 
     fn styles(&mut self, top: &[El]) {
+        for e in top.iter().filter(|e| e.local() == "Condition") {
+            let (Some(id), Some(name)) = (e.get("Self"), e.get("Name")) else { continue };
+            // Indicator colours: "r g b" (0–255) or a UI colour name (kept as the default blue).
+            let nums: Vec<u8> = e
+                .get("IndicatorColor")
+                .unwrap_or("")
+                .split_whitespace()
+                .filter_map(|x| x.parse::<f64>().ok())
+                .map(|x| x.clamp(0.0, 255.0) as u8)
+                .collect();
+            let color = if nums.len() == 3 { [nums[0], nums[1], nums[2]] } else { [79, 153, 255] };
+            self.condition_names.insert(id.to_string(), name.to_string());
+            self.conditions.push(designcraft_doc::Condition { name: name.to_string(), color, visible: e.get("Visible") != Some("false") });
+        }
         for e in top.iter().filter(|e| e.local() == "NumberingList") {
             let name = e.get("Name").unwrap_or("").to_string();
             if !name.is_empty() && !name.starts_with("$ID/") && !self.lists.iter().any(|l| l.name == name) {
@@ -1004,6 +1022,12 @@ impl<'r> Importer<'r> {
             a.otf_features = Some(otf_list);
         }
         a.no_break = e.boolean("NoBreak");
+        if let Some(v) = e.get("AppliedConditions").filter(|v| !v.trim().is_empty()) {
+            let names: Vec<String> = v.split_whitespace().filter_map(|r| self.condition_names.get(r).cloned()).collect();
+            if !names.is_empty() {
+                a.conditions = Some(names);
+            }
+        }
         a.language = e.prop("AppliedLanguage").map(|l| l.trim().trim_start_matches("$ID/").to_string());
         a
     }
@@ -1956,6 +1980,7 @@ impl<'r> Importer<'r> {
             styles: Arc::new(std::mem::take(&mut self.styles)),
             swatches: std::mem::take(&mut self.swatches),
             color_groups: std::mem::take(&mut self.color_groups),
+            conditions: std::mem::take(&mut self.conditions),
             sections: std::mem::take(&mut self.sections),
             assets: std::mem::take(&mut self.assets),
             hyperlinks: vec![],
diff --git a/crates/render/src/lib.rs b/crates/render/src/lib.rs
index 225a258..a3d2b68 100644
--- a/crates/render/src/lib.rs
+++ b/crates/render/src/lib.rs
@@ -105,6 +105,8 @@ pub struct RenderOptions {
     pub highlight_hj: bool,
     pub highlight_keeps: bool,
     pub highlight_custom_tracking: bool,
+    /// Conditional text indicators: an underline in each condition's colour (screen view).
+    pub condition_indicators: bool,
     /// View › Display Performance.
     pub quality: DisplayQuality,
     /// Preferences › Appearance of Black: show 100% K as rich (pure) black instead of the
@@ -140,6 +142,7 @@ impl Default for RenderOptions {
             highlight_hj: false,
             highlight_keeps: false,
             highlight_custom_tracking: false,
+            condition_indicators: false,
             quality: DisplayQuality::High,
             rich_black: false,
             overprint_preview: false,
diff --git a/crates/render/src/text.rs b/crates/render/src/text.rs
index b03d241..fc57274 100644
--- a/crates/render/src/text.rs
+++ b/crates/render/src/text.rs
@@ -229,6 +229,19 @@ impl Renderer {
                 }
             }
         }
+        if f.opts.condition_indicators && !f.doc.conditions.is_empty() && cs.styles.iter().any(|s| s.condition.is_some()) {
+            ctx.set_transform(m);
+            let px = 1.0 / m.determinant().abs().sqrt().max(1e-9);
+            for l in &ft.lines {
+                for g in l.glyphs.iter().filter(|g| g.visible && g.adv > 0.0) {
+                    let Some(name) = cs.styles.get(g.style as usize).and_then(|s| s.condition.as_deref()) else { continue };
+                    let Some(c) = f.doc.conditions.iter().find(|c| c.name == name) else { continue };
+                    ctx.set_paint(peniko::Color::from_rgb8(c.color[0], c.color[1], c.color[2]));
+                    let y = l.baseline + l.descent * 0.6;
+                    ctx.fill_rect(&kurbo::Rect::new(g.x, y, g.x + g.adv, y + 2.0 * px));
+                }
+            }
+        }
         let scale = m.determinant().abs().sqrt();
         let greek_px = f.opts.greek_below_px;
         let mut greek = BezPath::new();
diff --git a/crates/textimport/src/export.rs b/crates/textimport/src/export.rs
index f814c1e..49c2092 100644
--- a/crates/textimport/src/export.rs
+++ b/crates/textimport/src/export.rs
@@ -92,6 +92,10 @@ pub fn rtf(doc: &Document, story: &Story) -> String {
                 continue;
             }
             let cp = styles.resolve_char(&base, f);
+            // Hidden conditional text isn't exported.
+            if doc.conditions_hide(&cp.conditions) {
+                continue;
+            }
             if !fonts.contains(&cp.font_family) {
                 fonts.push(cp.font_family.clone());
             }
diff --git a/crates/ui-egui/src/canvas.rs b/crates/ui-egui/src/canvas.rs
index be5f38d..a0a743d 100644
--- a/crates/ui-egui/src/canvas.rs
+++ b/crates/ui-egui/src/canvas.rs
@@ -312,6 +312,7 @@ fn render_texture(app: &mut DesignApp, ctx: &egui::Context, rect: Rect, xf: &Xf,
             greek_below_px: 3.0 * ppp,
             highlight_missing_fonts: !preview && app.session.prefs.highlight_substituted_fonts,
             highlight_hj: !preview && app.session.prefs.highlight_hj,
+            condition_indicators: !preview,
             highlight_keeps: !preview && app.session.prefs.highlight_keeps,
             highlight_custom_tracking: !preview && app.session.prefs.highlight_custom_tracking,
             quality: app.ui.display_quality,
@@ -420,6 +421,7 @@ fn patch_texture(app: &mut DesignApp, layout: &CanvasLayout, ppp: f64, doc_key:
         greek_below_px: 3.0 * ppp,
         highlight_missing_fonts: !preview && app.session.prefs.highlight_substituted_fonts,
         highlight_hj: !preview && app.session.prefs.highlight_hj,
+        condition_indicators: !preview,
         highlight_keeps: !preview && app.session.prefs.highlight_keeps,
         highlight_custom_tracking: !preview && app.session.prefs.highlight_custom_tracking,
         quality: app.ui.display_quality,
diff --git a/crates/ui-egui/src/dock.rs b/crates/ui-egui/src/dock.rs
index 2a9b9cf..30ba798 100644
--- a/crates/ui-egui/src/dock.rs
+++ b/crates/ui-egui/src/dock.rs
@@ -30,6 +30,7 @@ pub const ICON_PANELS: &[(&str, &str, &str)] = &[
     ("info", "Info", "panel-info"),
     ("preflight", "Preflight", "panel-preflight"),
     ("attributes", "Attributes", "panel-attributes"),
+    ("conditions", "Conditional Text", "panel-conditions"),
 ];
 
 pub fn show(app: &mut DesignApp, ui: &mut egui::Ui) {
@@ -165,6 +166,7 @@ pub fn panel_body(app: &mut DesignApp, ui: &mut egui::Ui, id: &str) {
         "links" => panels::properties::links_panel(app, ui),
         "preflight" => panels::properties::preflight_panel(app, ui),
         "attributes" => panels::properties::attributes_panel(app, ui),
+        "conditions" => panels::conditions::show(app, ui),
         "table" => panels::table::show(app, ui),
         _ => panels::properties::info_panel(app, ui),
     }
diff --git a/crates/ui-egui/src/icons.rs b/crates/ui-egui/src/icons.rs
index 8458da4..4885eaf 100644
--- a/crates/ui-egui/src/icons.rs
+++ b/crates/ui-egui/src/icons.rs
@@ -310,6 +310,13 @@ pub fn paint(p: &Painter, r: Rect, name: &str, c: Color32) {
             pen.circle(10.0, 10.0, 7.0);
             pen.line(&[(6.5, 10.0), (9.0, 12.5), (13.5, 7.5)]);
         }
+        "panel-conditions" => {
+            // Text lines, one marked.
+            pen.line(&[(3.0, 6.0), (17.0, 6.0)]);
+            pen.line(&[(3.0, 10.0), (17.0, 10.0)]);
+            pen.line(&[(3.0, 14.0), (11.0, 14.0)]);
+            pen.line(&[(3.0, 16.5), (11.0, 16.5)]);
+        }
         "panel-attributes" => {
             // Two overlapping inks: overprint.
             pen.rect(3.0, 3.0, 13.0, 13.0);
diff --git a/crates/ui-egui/src/menus.rs b/crates/ui-egui/src/menus.rs
index 0e291e7..16e02a0 100644
--- a/crates/ui-egui/src/menus.rs
+++ b/crates/ui-egui/src/menus.rs
@@ -462,6 +462,10 @@ pub const MENUS: &[(&str, &[&str])] = &[
             "-",
             "ui:window.panel",
             "-",
+            ">Type & Tables",
+            "ui:window.panel|Conditional Text|{\"panel\": \"conditions\"}",
+            "ui:window.panel|Glyphs|{\"panel\": \"glyphs\"}",
+            "<",
             ">Utilities",
             "cmd:data.merge",
             "<",
diff --git a/crates/ui-egui/src/panels/conditions.rs b/crates/ui-egui/src/panels/conditions.rs
new file mode 100644
index 0000000..7386e46
--- /dev/null
+++ b/crates/ui-egui/src/panels/conditions.rs
@@ -0,0 +1,83 @@
+//! Conditional Text panel: conditions with their visibility and indicator colour; click a name to
+//! apply it to the selected text (the box shows whether the selection has it).
+
+use egui::{Sense, vec2};
+use serde_json::json;
+
+use crate::DesignApp;
+use crate::theme::Tokens;
+
+pub fn show(app: &mut DesignApp, ui: &mut egui::Ui) {
+    let t = Tokens::get(ui.ctx());
+    let Some(st) = app.session.active() else { return };
+    let conditions = st.doc.conditions.clone();
+    let has_text = st.selection.text.is_some();
+    // Conditions at the selection start (all runs share them for a "checked" box).
+    let applied: Vec<String> = super::text_attrs(app)
+        .and_then(|a| a["chars"]["conditions"].as_array().map(|v| v.iter().filter_map(|x| x.as_str().map(str::to_string)).collect()))
+        .unwrap_or_default();
+    if conditions.is_empty() {
+        ui.label(egui::RichText::new("No conditions. Create one, then select text and click it to apply.").size(11.0).color(t.text_dim));
+    }
+    for c in &conditions {
+        let (row, _) = ui.allocate_exact_size(vec2(ui.available_width(), 22.0), Sense::hover());
+        // Visibility (eye).
+        let eye = egui::Rect::from_min_size(row.min + vec2(2.0, 3.0), vec2(16.0, 16.0));
+        let er = ui.interact(eye, ui.id().with(("cond_eye", &c.name)), Sense::click()).on_hover_text("Show / hide text with this condition");
+        if c.visible {
+            crate::icons::paint(ui.painter(), eye, "eye", t.text_dim);
+        }
+        if er.clicked() {
+            let _ = app.run("condition.options", json!({"name": c.name, "visible": !c.visible}));
+        }
+        // Applied box.
+        let bx = egui::Rect::from_min_size(row.min + vec2(24.0, 5.0), vec2(12.0, 12.0));
+        ui.painter().rect_stroke(bx, 2.0, egui::Stroke::new(1.0, t.text_dim), egui::StrokeKind::Inside);
+        if applied.contains(&c.name) {
+            ui.painter()
+                .line_segment([bx.left_center() + vec2(2.0, 0.0), bx.center_bottom() - vec2(0.0, 3.0)], egui::Stroke::new(1.5, t.text_strong));
+            ui.painter().line_segment([bx.center_bottom() - vec2(0.0, 3.0), bx.right_top() + vec2(-2.0, 3.0)], egui::Stroke::new(1.5, t.text_strong));
+        }
+        // Name (click: toggle on the selected text) and indicator colour.
+        let name_r = egui::Rect::from_min_max(row.min + vec2(42.0, 0.0), row.max - vec2(24.0, 0.0));
+        let nr = ui.interact(name_r, ui.id().with(("cond_name", &c.name)), Sense::click());
+        if nr.hovered() {
+            ui.painter().rect_filled(name_r, 0.0, t.hover);
+        }
+        ui.painter().text(name_r.left_center() + vec2(4.0, 0.0), egui::Align2::LEFT_CENTER, &c.name, egui::FontId::proportional(12.5), t.text);
+        let chip = egui::Rect::from_min_size(egui::pos2(row.max.x - 20.0, row.min.y + 5.0), vec2(14.0, 12.0));
+        ui.painter().rect_filled(chip, 2.0, egui::Color32::from_rgb(c.color[0], c.color[1], c.color[2]));
+        if nr.clicked() {
+            if has_text {
+                let on = !applied.contains(&c.name);
+                if let Err(e) = app.run("condition.apply", json!({"name": c.name, "on": on})) {
+                    app.status(format!("Conditional Text: {e}"));
+                }
+            } else {
+                app.status("Select text to apply a condition".to_string());
+            }
+        }
+        nr.context_menu(|ui| {
+            if ui.button("Delete Condition").clicked() {
+                let _ = app.run("condition.delete", json!({"name": c.name}));
+                ui.close();
+            }
+        });
+    }
+    ui.add_space(6.0);
+    let id = egui::Id::new("new_condition_name");
+    let mut name: String = ui.data(|d| d.get_temp(id)).unwrap_or_default();
+    ui.horizontal(|ui| {
+        ui.add(egui::TextEdit::singleline(&mut name).hint_text("New condition name").desired_width(150.0));
+        if ui.button("New").clicked() && !name.trim().is_empty() {
+            match app.run("condition.new", json!({"name": name.trim()})) {
+                Ok(_) => name.clear(),
+                Err(e) => app.status(format!("Conditional Text: {e}")),
+            }
+        }
+    });
+    ui.data_mut(|d| d.insert_temp(id, name));
+    if has_text && !applied.is_empty() && ui.button("Remove Conditions from Selection").clicked() {
+        let _ = app.run("condition.apply", json!({"name": null, "only": true}));
+    }
+}
diff --git a/crates/ui-egui/src/panels/mod.rs b/crates/ui-egui/src/panels/mod.rs
index 3f8100f..904ac3f 100644
--- a/crates/ui-egui/src/panels/mod.rs
+++ b/crates/ui-egui/src/panels/mod.rs
@@ -1,5 +1,6 @@
 //! Panels and shared panel helpers.
 
+pub mod conditions;
 pub mod glyphs;
 pub mod layers;
 pub mod pages;
diff --git a/docs/parity.md b/docs/parity.md
index d804fd3..7b33c46 100644
--- a/docs/parity.md
+++ b/docs/parity.md
@@ -5,13 +5,13 @@ The summary is generated by `cargo xtask parity` from the table at the bottom of
 Each row of the InDesign feature catalogue is scored **D** (done), **P** (partial: works but lacks options or UI) or **M** (missing), weighted by priority (**P0** core = 3, **P1** = 2, **P2** = 1). Out-of-scope rows (Adobe cloud services, plug-ins, Typekit, Flash) are excluded.
 
 <!-- SUMMARY -->
-**Weighted breadth parity: 85%** over 275 features.
+**Weighted breadth parity: 86%** over 275 features.
 
 | Priority | Features | Done | Partial | Missing | Parity |
 |---|---|---|---|---|---|
 | P0 | 102 | 99 | 3 | 0 | 99% |
 | P1 | 97 | 74 | 21 | 2 | 87% |
-| P2 | 76 | 15 | 13 | 48 | 28% |
+| P2 | 76 | 16 | 13 | 47 | 30% |
 
 | Area | Parity |
 |---|---|
@@ -23,7 +23,7 @@ Each row of the InDesign feature catalogue is scored **D** (done), **P** (partia
 | Fill, stroke, colour | 88% |
 | Effects & transparency | 62% |
 | Placing & links | 82% |
-| Type & text frames | 88% |
+| Type & text frames | 89% |
 | Typography | 88% |
 | Styles | 92% |
 | Tables | 88% |
@@ -197,7 +197,7 @@ Open P0 items: Preferences, Vector/page formats (PDF/AI/SVG/EPS place), Export t
 | Type & text frames | Glyphs panel | P1 | D |
 | Type & text frames | Insert special chars / white space / breaks | P0 | D |
 | Type & text frames | Text variables | P1 | D |
-| Type & text frames | Conditional text | P2 | M |
+| Type & text frames | Conditional text | P2 | D |
 | Type & text frames | Fill with placeholder text | P1 | D |
 | Type & text frames | Create Outlines | P1 | D |
 | Type & text frames | Change Case | P0 | D |