Viewing and magnifying PDFs in Scrivener

OK, I must be doing something wrong: when I open the PDF files that I store in the research folder, I can’t zoom in or out. So some files are near-illegible because of the font size. How do I get around this? Thanks in advance!

Already answered you here:

https://forum.literatureandlatte.com/t/pdf-links-and-highlighting/6012/1

Best,
Keith

Thanks for the prompt reply, and apols for the cross-posting!