Highlight in PDFs

Hi
I have imported a PDF into my Scrivener research folder and would now like to highlight sections of text (ie make them yellow) as I would in Preview.
Is this possible within Scrivener or do I need to do it in Preview and then re-import the document ?

TIA

Hi, please either search the forum or checkout the topic in the FAQ (in the Tips & Tricks & FAQ section of the forum) entitled “I wish to annotate or edit some media that I have imported into my Scrivener project, does Scrivener have tools for editing PDFs, pictures, sound files, or other media?” This comes up a lot - the short answer is that you just need to use Open in External Editor and highlight using Preview.
All the best,
Keith