Background glyph
Draw over another glyph shown faintly behind, such as r behind ř.
Where
- Inspector › Layers
Pick another glyph to show faintly behind the one you're drawing. It lines up at the left edge, as the two would in text. For an accented or extra letter, its base letter is offered in one click. It's a drawing aid only: nothing of it is exported, and it follows along if you change the glyph behind.