Edit ▸ Undo with typing in a paragraph or added text box that the page
doesn't have yet applied the typing (a new edit, which dropped the
document's waiting Redo), closed the box and undid the typing all at
once; the key takes it back a step at a time in the box. Menu Undo now
goes to the box first, as Redo does, and is enabled while the box holds
such typing. Undo and Redo share typing_step for the box's own history.
RiceDee
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