G1: switch new ruler-guide orientation with Alt

Co-authored-by: Codex <noreply@openai.com>

docs/ui-parity.md

@@ -100,7 +100,7 @@ tools, never checked side by side) isn't captured row by row.
 | Ruler origin: corner drag with preview, double-click reset to the active artboard, relative X/Y fields, native save/reopen | done | #1212; `document.setRulerOrigin`, `document.resetRulerOrigin`; geometry and command coordinates stay absolute |
 | Ruler guides as Layers rows: shown, hidden, locked and deleted with their layer; rows dragged to another layer | done | `guide.setLayer`; guides from older files go on a layer |
 | Objects made into guides: drawn in the guide colour and style of Preferences; Lock Guides locks them too (no select, move or delete); a dragged selection snaps to ruler guides with Smart Guides on | done | #1534 (#1543, #1583) |
-| Alt swaps a ruler guide's orientation while dragging | missing | |
+| Alt swaps a new ruler guide's orientation while dragging | done | Both rulers; preview, snapping and final placement follow the current modifier; existing-guide Alt-copy is unchanged. |
 | Global/artboard ruler mode switch and video rulers | missing | menu stubs; custom document origin is done (#1212) |
 
 ## Transform handles, bounding box, Free Transform
@@ -203,6 +203,7 @@ re-measure of the panels added since.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-13 | minor | Alt during a drag from either ruler swaps the new guide's orientation ([public shortcut reference](https://helpx.adobe.com/illustrator/using/default-keyboard-shortcuts.html)); tool and egui event tests cover preview, snapping, release coordinates, cancellation and one-step Undo/Redo; scores unchanged (estimated). |
 | 2026-10-13 | minor | G1: create width points through Width Point Edit with optional adjoining adjustment; command/pointer/history regressions and full CI passed; dialog layout reviewed; scores and hours unchanged |
 | 2026-10-13 | minor | Corner Radius: a link toggle behind the field in the Properties and Transform panels; off, a live rectangle shows a radius field for each corner (Top Left, Top Right, Bottom Right, Bottom Left), each setting its own corner (`singleCornerRadius` preference); split from #1594; score unchanged (estimated) |
 | 2026-10-13 | minor | Join merges the selected anchor points that lie on one another, as after Average, into one anchor (#1582, fixes #1533); correction: "Join with corner/smooth choice" was listed as done, but `path.join` and `path.average` are separate commands and Join has no such choice, so Average and Join in one step with that choice is its own row, missing; the Smooth tool smooths only the stretch of path under the drag and a round corner next to a curved side curves smoothly instead of sticking out of the shape (#1547, fixes #1512); Lock Guides also locks the objects made into guides: they can't be selected, moved or deleted (#1543); they are drawn in the guide colour and style of Preferences, and a dragged selection snaps to ruler guides with Smart Guides on (#1583, fixes #1534); Edit › Keyboard Shortcuts lists Edit › Duplicate and the other commands that are in no menu but run without parameters (panel-menu commands such as Break Link to Symbol), so they can be given shortcuts (#1549, #1580, fixes #1539); Make Compound Path on a group (such as outlined type) keeps the paint of its backmost path instead of drawing nothing, and compound paths joined into one keep their holes (#1537); scores unchanged (estimated) |