The only 'Undo' button is in the e-book Editor
Both the Editor and built in Viewer have a recent file 'History' section
AFAIK any metadata / content change is only recoverable from restoring from a backup. as every book change includes a full transaction (file change and matching DB entry) which is why 'messing' inside the Library folder usually makes a bigger mess. (using 'restore' from Trash, puts the book back, but can't make the DB update needed)
|