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Edit and fill

Undo changes, or go back to the start

How to do it

Every tab keeps one undo history for page changes, marks and bookmarks, and saving doesn't clear it.

Press Ctrl+Z to undo, and Ctrl+Y to redo.
Keep pressing to go further back. You can go back past a save.
To throw away every change since you opened the file, choose Edit > Revert to Opened.
Save if you want the file on disk to match.

The Edit menu open on Revert to Opened

Good to know

The history belongs to the tab. Closing the tab ends it.
Typing in Edit Text has its own undo while the text box is open.
Changes stay in the open document until you save. If you save over the original, CrescentPDF asks first.

Try it in CrescentPDF.

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