Higlighting non-indexed pdf in Zotero 10

I have no IT department to turn to so help me out here. I just upgraded to 10 this morning. I cannot highlight pdfs. I'm using Windows 11 desktop, these are non-indexed documents from WWII, not academic journal articles. I could do this in the prior version, but not now. What happened to the "+" button that let me to "File?" Thanks!
Sign In or Register to comment.