There are 6 free training tips of how to use office suite for undefined
Insert comments in PDF files
01:30The Graffiti function used to mark in PDF
01:41How to insert a signature in a PDF file
02:16How to add a stamp in a PDF file
01:42How to highlight the content of a PDF file
02:04How to add annotations to PDF files
02:08Relate tags of office software WPS
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