https://ccm.net/forum/affich-1160828-unable-to-undo-changes-in-xodo-pdf-reader
Unable to undo changes in Xodo PDF Reader [Solved]
Best answer: Hi, To remove annotations in Xodo PDF, go to Annotations and select Clear. In case this doesn't work, it is possible to restore your PDF prior to...
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https://filepcr.com/xodo-pdf-reader-editor-9-7-1/
Xodo PDF Reader & Editor 9.7.1 - FilePCR.COM
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