photo.editExternal renders the active photo with its edits as a 16-bit TIFF "<name>-Edit.tif"
(Adobe RGB by default; ProPhoto / P3 / sRGB) next to the original, never overwriting, adds it
stacked on top of the original and selects it. Photo ▸ Edit in External Editor (⇧⌘E, as
observed; the export dialog stays on ⇧E) then opens it in the application set in Settings ▸
General ▸ External Editor, or the system default (desktop: open -a / start / xdg-open,
spawned, never waited for).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
9affd0e8d2