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So what I was looking for was a single app capable of pulling documents from Google, MobileMe and Dropbox, rendering them (even the large ones) with a crazy-fast engine and letting me annotate them.

But, it’s not as hard to complete forms or annotate documents in this format, and you don’t even need expensive software to do it. Here we look at a collection of PDF apps that are either ...

While deep PDF editing is best done on a desktop, it’s nice to be able to review and annotate files when you’re out and about. While PDFs can typically be reviewed in any PDF reader or editor ...

You can also sign a fillable form in Preview. 1. Open the PDF in Preview. 2. Click Tools > Annotate > Signature. 3. If you've already added a signature to Preview, it will appear in a pop-up box.