Mask Editing

The editor provides polygon points, brush, eraser, fill/clear concepts, undo/redo, zoom/pan presentation, opacity, edge context, and positive or negative prompts. Foreground and ignore regions are logically distinct. Brush size has a slider and keyboard-accessible controls; Apple Pencil is optional.

Prompt history is stored with the suggestion and is never confused with verified geometry. Raster changes increment the mask revision and update its SHA-256 integrity hash.