User Guide
Annotation Tools
Learn how to create and edit regions, textlines, and baselines in the editor.
Annotation Tools
LAREX annotations are built from three element types:
- Regions
- Textlines
- Baselines
Drawing Tools
| Tool | Shortcut | Notes |
|---|---|---|
| Select | V | Select/edit existing elements |
| Move | G | Move selected element(s) |
| Region (Polygon) | P | Draw polygon region |
| Region (Rectangle) | R | Draw rectangular region |
| Textline (Polygon) | T | Draw polygon textline |
| Textline (Rectangle) | Shift + T | Draw rectangular textline |
| Baseline | B | Draw polyline baseline |
| Cut Line | C | Cut using a polyline |
| Cut Polygon | Shift + C | Cut using a polygon |
| Cut Rectangle | Alt + C | Cut using a rectangle |
View Modes and Auto-Parenting
The view mode affects creation behavior:
Default(1): standard hierarchical editingTextline(2): textline creation can auto-create/find parent regionsBaseline(3): baseline creation can auto-create/find parent textline/region context
Drawing Behavior
Polygon and Polyline Modes
- Click to add points.
- Double-click to finish.
Rectangle Modes
- First click starts rectangle.
- Second click completes rectangle.
Cut Modes
- Cut line/polygon: click to add points, double-click to apply cut.
- Cut rectangle: first click starts, second click applies cut.
Selection and Navigation
| Action | Behavior |
|---|---|
| Click | Select element |
Shift + Click | Toggle item in multi-selection |
Shift + Drag | Marquee multi-selection |
Tab / Shift + Tab | Navigate next/previous selectable element |
Arrow Down / Arrow Up | Navigate next/previous selectable element |
Ctrl/Cmd + A | Select all selectable polygons |
Esc | Cancel active drawing or clear selection |
Editing
Geometry Editing
- Drag polygon or baseline nodes to reshape.
- Click near an edge/segment to insert a new node, then drag it.
- Parent/image constraints are enforced when enabled.
Structure Operations
From the Structure panel:
- Delete selected
- Hide selected
- Show selected
Merge
Mmerges selected elements when they are compatible (same type).
Delete
DeleteorBackspaceremoves selected elements.
Undo/Redo
| Action | Shortcut |
|---|---|
| Undo | Ctrl/Cmd + Z |
| Redo | Ctrl/Cmd + Shift + Z or Ctrl/Cmd + Y |