Part of #394: Highlight Alternate Glyphs paints pink behind OpenType substitutions.

crates/render/src/lib.rs

@@ -123,6 +123,10 @@ pub struct RenderOptions {
     pub mask_view: Option<NodeId>,
     /// Screen view: highlight substituted fonts and glyphs as Document Setup asks.
     pub highlight_substitutions: bool,
+    /// Screen view: Preferences › Type › Highlight Alternate Glyphs. Pink behind glyphs OpenType
+    /// features substituted (ligatures, contextual forms), not Document Setup's missing-glyph
+    /// highlights.
+    pub highlight_alternate_glyphs: bool,
     /// Edge smoothing (raster export option).
     pub anti_alias: AntiAlias,
     /// Screen view: placed documents draw from cached bitmaps made in the background (see
@@ -227,6 +231,7 @@ impl Default for RenderOptions {
             guide: ([0x4a, 0xd8, 0xff], false),
             mask_view: None,
             highlight_substitutions: false,
+            highlight_alternate_glyphs: false,
             anti_alias: AntiAlias::Art,
             progressive_placed: false,
             trace_views: false,
@@ -1789,8 +1794,11 @@ impl Renderer {
         }
         if f.opts.highlight_substitutions {
             let setup = &f.doc.setup;
-            for (on, path) in [(setup.highlight_substituted_fonts, &g.substituted_fonts), (setup.highlight_substituted_glyphs, &g.substituted_glyphs)]
-            {
+            for (on, path) in [
+                (setup.highlight_substituted_fonts, &g.substituted_fonts),
+                (setup.highlight_substituted_glyphs, &g.substituted_glyphs),
+                (f.opts.highlight_alternate_glyphs, &g.alternate_glyphs),
+            ] {
                 if on && !path.elements().is_empty() {
                     ctx.set_transform(xf);
                     ctx.set_fill_rule(peniko::Fill::NonZero);
@@ -2218,6 +2226,9 @@ struct TextGeom {
     /// font lacks (drawn from a fallback font): Document Setup's substitution highlights.
     substituted_fonts: BezPath,
     substituted_glyphs: BezPath,
+    /// Boxes of glyphs OpenType features substituted (ligatures, contextual forms): Preferences ›
+    /// Highlight Alternate Glyphs.
+    alternate_glyphs: BezPath,
     /// Inline graphics placed by the layout.
     inlines: Vec<vectorcraft_text::InlineGlyph>,
 }
@@ -2243,12 +2254,18 @@ impl TextGeom {
     /// Approximate heap bytes, for the cache's budget.
     fn bytes(&self) -> usize {
         size_of::<Self>()
-            + [&self.all, &self.substituted_fonts, &self.substituted_glyphs].into_iter().map(lru::path_bytes).sum::<usize>()
+            + [&self.all, &self.substituted_fonts, &self.substituted_glyphs, &self.alternate_glyphs].into_iter().map(lru::path_bytes).sum::<usize>()
             + self.spans.len() * size_of::<(usize, usize, usize)>()
             + self.inlines.len() * size_of::<vectorcraft_text::InlineGlyph>()
     }
 }
 
+/// OpenType-substituted form: a ligature (several source characters → one glyph) or a glyph whose
+/// id is not the face's cmap mapping for its first character (contextual / stylistic alternate).
+pub(crate) fn is_opentype_alternate(nominal_gid: u32, shaped_gid: u32, cluster_chars: usize) -> bool {
+    shaped_gid != 0 && (cluster_chars > 1 || shaped_gid != nominal_gid)
+}
+
 fn text_geom(t: &TextObject) -> TextGeom {
     text_geom_snapped(t, None)
 }
@@ -2288,30 +2305,39 @@ fn text_geom_snapped(t: &TextObject, snap: Option<Affine>) -> TextGeom {
             None => (true, None),
         })
         .collect();
-    let (mut substituted_fonts, mut substituted_glyphs) = (BezPath::new(), BezPath::new());
+    let (mut substituted_fonts, mut substituted_glyphs, mut alternate_glyphs) = (BezPath::new(), BezPath::new(), BezPath::new());
+    let plain = t.plain_text();
     for g in &layout.glyphs {
         push(&mut all, g.run, &g.outline);
         let Some(&(missing, face)) = faces.get(g.run) else { continue };
-        let target = if missing {
-            &mut substituted_fonts
-        } else if face.is_some_and(|f| f != g.font_id) {
-            &mut substituted_glyphs
-        } else {
-            continue;
-        };
         let Some(line) = layout.lines.get(g.line) else { continue };
         let mut cell = Rect::new(g.origin.x, g.origin.y - line.ascent, g.origin.x + g.advance, g.origin.y + line.descent).to_path(0.1);
         cell.apply_affine(Affine::rotate_about(g.angle, g.origin));
-        target.extend(cell.iter());
+        if missing {
+            substituted_fonts.extend(cell.iter());
+            continue;
+        }
+        if face.is_some_and(|f| f != g.font_id) {
+            substituted_glyphs.extend(cell.iter());
+            continue;
+        }
+        // Same face: OpenType may have swapped the glyph (liga, calt, …).
+        let Some(cluster) = plain.get(g.byte..g.byte.saturating_add(g.len)) else { continue };
+        let cluster_chars = cluster.chars().count();
+        let Some(first) = cluster.chars().next() else { continue };
+        let nominal = db.face_by_id(g.font_id).map(|f| f.glyph_for(first)).unwrap_or(0);
+        if is_opentype_alternate(nominal, g.gid, cluster_chars) {
+            alternate_glyphs.extend(cell.iter());
+        }
     }
     // Underline and strikethrough bars, painted as their run's type is (#847).
     for (run, bar) in vectorcraft_text::decorations(&layout, db, t) {
         push(&mut all, run, &bar);
     }
-    TextGeom { all, spans, bounds: layout.bounds, substituted_fonts, substituted_glyphs, inlines: layout.inlines }
+    TextGeom { all, spans, bounds: layout.bounds, substituted_fonts, substituted_glyphs, alternate_glyphs, inlines: layout.inlines }
 }
 
-/// Document Setup's highlight behind substituted fonts and glyphs (screen only).
+/// Document Setup's and Preferences › Highlight Alternate Glyphs pink (screen only).
 const SUBSTITUTED: peniko::Color = peniko::Color::from_rgba8(255, 120, 190, 110);
 /// The pixel size of `region` rendered at `scale` pixels per point (at least 1×1).
 pub fn region_pixels(region: Rect, scale: f64) -> (u32, u32) {
@@ -2367,6 +2393,8 @@ mod tests;
 #[cfg(test)]
 mod tests_adjust;
 #[cfg(test)]
+mod tests_alternate;
+#[cfg(test)]
 mod tests_blend;
 #[cfg(test)]
 mod tests_charstroke;

crates/render/src/tests_alternate.rs

@@ -0,0 +1,37 @@
+//! Preferences › Type › Highlight Alternate Glyphs (#394): OpenType substitutions get a pink
+//! cell behind them on screen when the preference is on.
+
+use super::*;
+
+#[test]
+fn is_opentype_alternate_marks_ligatures_and_forms() {
+    assert!(is_opentype_alternate(100, 100, 2), "ligature cluster");
+    assert!(is_opentype_alternate(50, 99, 1), "contextual / stylistic form");
+    assert!(!is_opentype_alternate(50, 50, 1), "nominal cmap glyph");
+    assert!(!is_opentype_alternate(50, 0, 2), "missing glyph");
+}
+
+#[test]
+fn highlight_alternate_glyphs_paints_pink_behind_a_ligature() {
+    use vectorcraft_doc::text::{CharStyle, TextObject};
+    use vectorcraft_doc::{Node, NodeKind};
+    use vectorcraft_geom::Point;
+
+    // Source Serif 4 ships with standard ligatures for "fi".
+    let mut d = Document::new(200.0, 100.0);
+    let style = CharStyle { size: 48.0, font_family: "Source Serif 4".into(), ..Default::default() };
+    let mut n = Node::new(NodeId(0), NodeKind::Text(Box::new(TextObject::point(Point::new(20.0, 70.0), "fi", style))));
+    n.id = d.alloc_id();
+    let l = d.layers[0].id;
+    d.insert(Some(l), 0, n).unwrap();
+
+    let off = RenderOptions { background: Some([255, 255, 255, 255]), highlight_substitutions: true, highlight_alternate_glyphs: false, ..Default::default() };
+    let on = RenderOptions { highlight_alternate_glyphs: true, ..off.clone() };
+    let mut r = Renderer::new();
+    let without = r.render(&d, 200, 100, Affine::IDENTITY, &off);
+    let with = r.render(&d, 200, 100, Affine::IDENTITY, &on);
+    assert_ne!(without.pixels, with.pixels, "the preference changes the frame");
+    // Pink SUBSTITUTED = (255, 120, 190) at alpha 110, blended over white / ink.
+    let pinkish = with.pixels.chunks(4).filter(|p| p[0] > 200 && p[1] < 180 && p[2] > 150 && p[2] < 230).count();
+    assert!(pinkish > 10, "pink highlight cells behind the ligature ({pinkish} pixels)");
+}

crates/ui-egui/src/canvas.rs

@@ -302,6 +302,7 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
         hidden: vec![],
         rot: v.rotation,
         anti_alias: app.session.prefs.anti_aliased_artwork,
+        highlight_alternate_glyphs: app.session.prefs.highlight_alternate_glyphs,
         placed: vectorcraft_render::placed_document::generation(),
         pixel,
         smooth_images,
@@ -354,6 +355,8 @@ pub fn show(app: &mut VectorcraftApp, ui: &mut Ui) {
             guide: key.guide,
             mask_view,
             highlight_substitutions: true,
+            // Type › Highlight Alternate Glyphs (#394): pink behind OpenType substitutions.
+            highlight_alternate_glyphs: app.session.prefs.highlight_alternate_glyphs,
             // General › Anti-aliased Artwork: off, edges are hard on screen (raster effects and
             // pattern tiles stay smooth), as in Illustrator.
             anti_alias: if app.session.prefs.anti_aliased_artwork { vectorcraft_render::AntiAlias::Art } else { vectorcraft_render::AntiAlias::None },

crates/ui-egui/src/lib.rs

@@ -332,6 +332,8 @@ pub struct CacheKey {
     pub rot: f64,
     /// General › Anti-aliased Artwork.
     pub anti_alias: bool,
+    /// Type › Highlight Alternate Glyphs (#394).
+    pub highlight_alternate_glyphs: bool,
     /// [`vectorcraft_render::placed_document::generation`]: placed documents' bitmaps made since.
     pub placed: u64,
     /// View › Pixel Preview: the document pixels rendered (x0, y0, x1, y1), one per point, shown

docs/gaps.md

@@ -193,8 +193,8 @@ from G14 and the budget run of G15: **~170–270 h** one agent, ~50–80 h wall
 
 ## G12 Preferences and panels that don't act yet
 
+- **Missing:** ~14 Preferences options stored but not acted on (#394: Open
 - **Done:** quick Image Trace presets reveal Threshold and Advanced controls (Paths, Corners, Noise); Properties can reopen them. Other context-specific Properties gaps remain.
-
 - **Missing:** ~15 Preferences options stored but not acted on (#394: Highlight Alternate Glyphs, Open
   Documents As Tabs, Real-time Drawing, hyphenation language, devices…), Properties panel per
   context, context menus beyond the canvas, Layers panel row menus and Collect for Export, SVG Interactivity.

docs/mcp.md

@@ -1974,9 +1974,11 @@ their own Anti-aliasing option),
 `scrubNumericFields` (on: a horizontal drag on a numeric field's label steps the field, one undo step per drag; the
 control channel's `ui.drag` scrubs), `showHomeScreen` (on by default: the Home screen while no document is open;
 off, an empty window, and the Home button or `app.home` still shows the screen), `autoCollapseIconPanels` (off by
-default: on, a click away from a panel popped out of the icon column puts it away) and `displayPrintSize` (off by
+default: on, a click away from a panel popped out of the icon column puts it away), `displayPrintSize` (off by
 default: View › Actual Size / `view.actualSize` is one document point per screen point; on, one document inch fills
-96 screen points, an inch at the system's reference density whatever the display scaling). `blackOnScreen`
+96 screen points, an inch at the system's reference density whatever the display scaling). `highlightAlternateGlyphs` (on by default: the canvas paints a pink cell behind glyphs OpenType features
+substituted — ligatures, contextual forms — on screen; Document Setup's Highlight Substituted Fonts / Glyphs stay
+separate). `blackOnScreen`
 (Appearance of Black › On Screen, `accurate` by default) sets how the canvas shows pure CMYK black, black ink alone
 at 100%: `accurate` shows it through the CMYK profile, a dark grey, and `rich` shows it as RGB black. Rich blacks,
 black tints and images show the same either way, and exports are unchanged. `blackOutput` (Appearance of Black ›

docs/target-app-parity.md

@@ -334,6 +334,7 @@ about 1–1.5 agent-hours each, so the other rows (estimated on the older scale)
 | Export for Screens, Asset Export, slices, Save for Web | 3 | 85% | polish only (all four are done) | 2–4 |
 | Print, colour management, separations, flattener | 3 | 80% | print preview fidelity (flattener presets in PDF and print, overprint in PDF and composite print, Print dialog, presets, PostScript, marks, separations, Print Tiling, print overprint/flattener/bitmap options and printer profile are done) | 1–2 |
 | Automation | 3 | 65% | scripting surface, batch (MCP drops malformed app replies without replay; Variables: text/visibility variables bound to objects, an object may carry several, dataset rows applied in one undo step, panel and Window › Variables with dialogs; image/graph kinds and dataset import/export open) | 6–10 |
+| UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 80% | macOS native menu dismissal fixed (M14.8); Variables, Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done; remaining: SVG Interactivity, Properties per context, Consolidate All Windows, floating panels outside the app window and docked into any group, context menus beyond the canvas, about 13 Preferences options stored but not yet acted on (#394: Open Documents As Tabs, Real-time Drawing, hyphenation language, devices…) | 13–20 |
 | UI chrome (panels, contextual Properties, workspaces, prefs) | 6 | 80% | macOS native menu dismissal fixed (M14.8); Variables, Links, Asset Export, CSS Properties, Attributes and the canvas context menu are done; remaining: SVG Interactivity, Properties per context, Consolidate All Windows, floating panels outside the app window and docked into any group, context menus beyond the canvas, about 14 Preferences options stored but not yet acted on (#394: Highlight Alternate Glyphs, Open Documents As Tabs, Real-time Drawing, hyphenation language, devices…) | 13–20 |
 | Libraries, Links, Package | 2 | 82% | the Libraries panel is local only (no cloud by design: libraries are files on this machine) and has no shared libraries, linked graphics or gradients and patterns as items yet; its graphics, colours and text styles (#745) and its search, groups and library export/import as `.vclibrary` files (#926) are done; Links and Package are done; placed VectorCraft documents are done (linked by default, vectors in every output, previews, Break Link, Expand, Edit Original, refresh on save) | 2–3 |
 | **Feature parity** | **103** | **~75%** | | **~210–330** |
@@ -443,6 +444,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - Native macOS save sheets offer a localised Format menu (#866), built from the request's existing format filters. It selects the suggested filename's format and updates the suffix when changed, including legacy `.drawcraft` names. `apps/vectorcraft/src/mac_save_format.rs` has filename regressions; an actual native SVG save, selection of PDF and cancellation without changing the saved document were verified.
   - Save / Don't Save / Cancel before closing or quitting with unsaved documents (tabs, Close, Close All, Quit, window close).
   - Four brightness themes, persistent preferences.
+  - Preferences that act (#394, in part): Show Tool Tips, Double Click To Isolate, Zoom with Mouse Wheel (the wheel zooms about the pointer, Shift-wheel scrolls up and down, Cmd/Ctrl-wheel sideways; Alt/Option-wheel and a trackpad pinch zoom about the pointer either way), Use Precise Cursors; Selection & Anchor Display › Tolerance (objects, anchors and handles), Object Selection by Path Only, Command Click to Select Objects Behind (cycling down the stack), Zoom to Selection, anchor Size, Highlight anchors on mouse over; Type › Number of Recent Fonts (up to 15); Guides & Grid › guide and grid Color and Style (lines or dots) and Grids In Back. Then Snap to Point (its distance, for moves, drawn points and reference points), Move Locked and Hidden Artwork with Artboard, Enable Rubber Band for the Pen and Curvature tools, Handles style, Show handles when multiple anchors are selected, Hide Corner Widget for angles greater than; General › Transform Pattern Tiles (the transforms' and dialogs' Transform Patterns, Align and Distribute, art moved or duplicated with an artboard, and objects moved whole with direct-selected anchors) and Select Same Tint %; Type › Size/Leading, Tracking and Baseline Shift increments (`type.step`, Cmd+Shift+. and Cmd+Shift+, for the size, the Type tool's Alt+arrows), Enable Missing Glyph Protection and Fill New Type Objects With Placeholder Text. Then Smart Guides › Color, Alignment Guides, Anchor/Path Labels, Measurement Labels, Transform Tools, Object Highlighting (with Smart Guides on) and Snapping Tolerance (4 px by default, for every smart guide snap), then Construction Guides and their Angles (#506: a drawn point near a line at one of those angles through the point it leaves from lands on it). Then Type › Type Object Selection by Path Only (type is picked on the baseline of any of its lines, area type's frame or the path of type on a path, no longer anywhere in its bounds; the Type tools and the Eyedropper still take a click among the characters). Then General › Anti-aliased Artwork (off, the canvas draws the art with hard edges). Then Guides & Grid › Show Pixel Grid (Above 600% Zoom), a line at every document pixel over the art in Pixel Preview, turning with a rotated view as the document grid now does too. Then General › Show The Home Screen When No Documents Are Open (off, closing the last document leaves an empty window; the Home button still opens the screen). Then Units › Numbers Without Units Are Points (on by default: a number typed with no unit into a field in picas is read in points, a typed unit still wins; dimmed unless a unit is Picas). Then User Interface › Auto-Collapse Iconic Panels (off by default: on, a click away from a panel popped out of the icon column puts it away). Then Performance › Animated Zoom (on, with GPU Performance, which it needs and which dims it when off: the Zoom tool dragged sideways zooms about the press, right in and left out, and held still zooms on, Alt out; off, a drag zooms to the area dragged across, now drawn as a marquee), User Interface › Large Tabs (taller document tabs) and Scale Cursor Proportional to UI (off, the tool cursors keep their size whatever the UI Scaling), and File Handling › Display Bitmaps as Anti-aliased Images in Pixel Preview (off by default: Pixel Preview draws images with each pixel taking its nearest image pixel). Type › Auto Size New Area Type works too (new area type gets Auto Size). They reach agents too (`prefs.set`, then `pointer_gesture` or `press_key`; `ui.wheel` on the control channel). Then Smart Guides › Spacing Guides (moves space the selection evenly with its row or column, see Drawing aids). Then Hyphenation › Exceptions (comma-separated words that never break, or break only at their hyphens; `prefs.set` and restore push them into the hyphenator, #394). Then Type › Show Font Names in English (off, font menus label a family by its native-language name when the font has one; documents still use the English family, #394). Then General › Display Print Size at 100% Zoom (off by default: View › Actual Size is one document point per screen point; on, one document inch fills 96 screen points, an inch at the reference density display scaling is set against; `view.actualSize` / `prefs.set`, #394). Then Guides & Grid › Gridline every and Subdivisions (changing either sets the grid of every open document; new and opened documents take that grid too, except a native file and the native document an SVG, PDF, `.ai` or EPS file carries, which open with the grid they were saved with; `file.new`, `document.open`, `file.newFromTemplate`, `file.revert`, #394). Then Appearance of Black › On Screen (Display All Blacks Accurately by default: pure CMYK black shows through the CMYK profile, a dark grey; Display All Blacks as Rich Black shows it on the canvas as RGB black, also in CMYK documents drawn by ink planes, while rich blacks, black tints and images show as before; `RendeLine truncated
   - The desktop app keeps the Color panel's Show Options or Hide Options between sessions, and `ui.colorPanel` sets its mode and options as its panel menu does.
   - Preferences that act (#394, in part): Show Tool Tips, Double Click To Isolate, Zoom with Mouse Wheel (the wheel zooms about the pointer, Shift-wheel scrolls up and down, Cmd/Ctrl-wheel sideways; Alt/Option-wheel and a trackpad pinch zoom about the pointer either way), Use Precise Cursors; Selection & Anchor Display › Tolerance (objects, anchors and handles), Object Selection by Path Only, Command Click to Select Objects Behind (cycling down the stack), Zoom to Selection, anchor Size, Highlight anchors on mouse over; Type › Number of Recent Fonts (up to 15); Guides & Grid › guide and grid Color and Style (lines or dots) and Grids In Back. Then Snap to Point (its distance, for moves, drawn points and reference points), Move Locked and Hidden Artwork with Artboard, Enable Rubber Band for the Pen and Curvature tools, Handles style, Show handles when multiple anchors are selected, Hide Corner Widget for angles greater than; General › Transform Pattern Tiles (the transforms' and dialogs' Transform Patterns, Align and Distribute, art moved or duplicated with an artboard, and objects moved whole with direct-selected anchors) and Select Same Tint %; Type › Size/Leading, Tracking and Baseline Shift increments (`type.step`, Cmd+Shift+. and Cmd+Shift+, for the size, the Type tool's Alt+arrows), Enable Missing Glyph Protection and Fill New Type Objects With Placeholder Text. Then Smart Guides › Color, Alignment Guides, Anchor/Path Labels, Measurement Labels, Transform Tools, Object Highlighting (with Smart Guides on) and Snapping Tolerance (4 px by default, for every smart guide snap), then Construction Guides and their Angles (#506: a drawn point near a line at one of those angles through the point it leaves from lands on it). Then Type › Type Object Selection by Path Only (type is picked on the baseline of any of its lines, area type's frame or the path of type on a path, no longer anywhere in its bounds; the Type tools and the Eyedropper still take a click among the characters). Then General › Anti-aliased Artwork (off, the canvas draws the art with hard edges). Then Guides & Grid › Show Pixel Grid (Above 600% Zoom), a line at every document pixel over the art in Pixel Preview, turning with a rotated view as the document grid now does too. Then General › Show The Home Screen When No Documents Are Open (off, closing the last document leaves an empty window; the Home button still opens the screen). Then Units › Numbers Without Units Are Points (on by default: a number typed with no unit into a field in picas is read in points, a typed unit still wins; dimmed unless a unit is Picas). Then User Interface › Auto-Collapse Iconic Panels (off by default: on, a click away from a panel popped out of the icon column puts it away). Then Performance › Animated Zoom (on, with GPU Performance, which it needs and which dims it when off: the Zoom tool dragged sideways zooms about the press, right in and left out, and held still zooms on, Alt out; off, a drag zooms to the area dragged across, now drawn as a marquee), User Interface › Large Tabs (taller document tabs) and Scale Cursor Proportional to UI (off, the tool cursors keep their size whatever the UI Scaling), and File Handling › Display Bitmaps as Anti-aliased Images in Pixel Preview (off by default: Pixel Preview draws images with each pixel taking its nearest image pixel). Type › Auto Size New Area Type works too (new area type gets Auto Size). They reach agents too (`prefs.set`, then `pointer_gesture` or `press_key`; `ui.wheel` on the control channel). Then Smart Guides › Spacing Guides (moves space the selection evenly with its row or column, see Drawing aids). Then Hyphenation › Exceptions (comma-separated words that never break, or break only at their hyphens; `prefs.set` and restore push them into the hyphenator, #394). Then Type › Show Font Names in English (off, font menus label a family by its native-language name when the font has one; documents still use the English family, #394). Then General › Display Print Size at 100% Zoom (off by default: View › Actual Size is one document point per screen point; on, one document inch fills 96 screen points, an inch at the reference density display scaling is set against; `view.actualSize` / `prefs.set`, #394). Then Guides & Grid › Gridline every and Subdivisions (changing either sets the grid of every open document; new and opened documents take that grid too, except a native file and the native document an SVG, PDF, `.ai` or EPS file carries, which open with the grid they were saved with; `file.new`, `document.open`, `file.newFromTemplate`, `file.revert`, #394). Then Appearance of Black › On Screen (Display All Blacks Accurately by default: pure CMYK black shows through the CMYK profile, a dark grey; Display All Blacks as Rich Black shows it on the canvas as RGB black, also in CMYK documents drawn by ink planes, while rich blacks, black tints and images show as before; `RendeLine truncated
   - Dialogs move by dragging their heading (the band down from the top edge, as a title bar), stay on screen and keep where they were moved for the session; the form dialogs' choices are dropdowns (Offset Path's Joins, Average's and Shear's and Reflect's axis), and Offset Path lists Offset, Joins, Miter Limit and previews (#423).

docs/type-parity.md

@@ -25,7 +25,7 @@ against Illustrator's public documentation; **estimated** unless noted.
 | Character and Paragraph panels, styles with overrides | done | Character-style Auto-leading resets, partial definitions, local leading overrides, override markers, Undo/Redo and native serialization have regression coverage; differing paragraph alignments leave the shared alignment buttons unselected (headless regressions, full integration CI and visual review pass); mixed-value display for other paragraph fields remains missing |
 | Character size and horizontal scale after object/group scaling | done | #1034: fields and setters compensate the stored affine; point size follows the transformed em-height axis, not the glyph ink bounds. Range edits, keyboard increments, leading and baseline shift use document points; rotation, reflection and shear remain editable. |
 | Preserve font sizes while scaling a group | missing | Separate enhancement; scaling still scales text with the other artwork. |
-| OpenType panel, Glyphs panel, alternates | done | Highlight Alternate Glyphs preference unused (#394); stylistic sets ss01–ss20, stylistic and titling alternates, proportional and lining figures, superscript and subscript are character-style features (`text.setStyle {features}`, #1607) |
+| OpenType panel, Glyphs panel, alternates | done | Highlight Alternate Glyphs preference (#394) paints pink behind OpenType substitutions on screen; stylistic sets ss01–ss20, stylistic and titling alternates, proportional and lining figures, superscript and subscript are character-style features (`text.setStyle {features}`, #1607) |
 | Font menu: samples, live preview, filters, favourites; font matching by any name; Find Font | done | #339; script filter: Japanese, Latin, Thai; the font scan on Linux also reads the folders fontconfig's configuration lists, such as TeX fonts under `/usr/share/texmf/fonts` (#1548, fixes #1529; not verified on Linux) |
 | Missing glyphs set in an installed font made for their script (Thai, Lao, Khmer, Myanmar first; then any font that has them) | done | Thai: Leelawadee UI, Tahoma, Thonburi, Sukhumvit Set, Noto Sans Thai, TLWG |
 | Full font-name matching (OpenType name ID 4) | done | #1258: loaded/cataloged faces and Missing Fonts searches; localized names and variable default faces; Windows font-service QA pending |