Dragging a numeric field's label left or right steps the field's value,
as Photoshop's scrubby labels do (beyond Illustrator): one unit every
2 points, ten with Shift, a tenth with Ctrl/Cmd (counts stay whole), in
the field's unit and precision. The panels apply each value as they
apply a typed one, so the art follows live and the caller's limits
hold (dragging back from a limit changes the value at once).
- scrub.rs: the label zone over the label noted just before a field
(dim_label, label_row, widgets::field_label, the Character and
Paragraph panels' icons, the Transform and Properties rotate/shear
icons), the ↔ cursor on hover, a click on the label focuses the
field. The text box itself never scrubs; a field without a label
doesn't. num_field, plain_field, mixed_field (and the spin fields)
and opt_field take part.
- Engine: undo groups (Session::begin_undo_group / end_undo_group). The
edits made in a group, commands and committed live drags alike, are
one undo step, journaled one by one; a cancelled group is undone and
dropped from the journal. The app opens one while a label is dragged,
so a scrub is one undo step whichever path the panel applies values
by (app.run, session.execute, live_run), and Escape cancels it
(shortcuts leave Escape to the drag, so it doesn't close a dialog or
deselect).
- Preferences > General > Scrub Numeric Fields by Dragging
(`scrubNumericFields`, on by default), translated in ja, es, zh-hans,
zh-hant and pt-br.
- Tests: label drags with Shift/Ctrl, limits, counts and units, Escape,
the preference, the cursor, click-to-focus, no scrub on the box or
without a label, and in the app one undo step for a W drag.
- ROADMAP and docs/mcp.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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