Flatten Outlines permanently resolves every form of indirect outline data on the active layer into plain outline geometry. It is the one-shot equivalent of running each individual bake command in order.
The command applies, in order:
•Path decoration decomposition
•Stroke expansion
•Component decomposition
•Mask flattening
•Overlap union
After the command runs, the authored outline reflects exactly the shape that the font exporter would produce — without strokes, without decorations, without components, without masks, with all overlaps resolved.
When to Use It
Reach for it when the authored geometry itself should match the exported shape — for example to hand the glyph off to a tool that does not understand any of the indirection forms FontCreator supports. The font exporter applies the same steps automatically, so for normal export workflows this command is not needed.
Available from Glyph → Decompose → Flatten Outlines (everything) in the main menu.