You can type on a PDF using one of several different options, depending on the device you are using.

You can combine multiple PDF files into a single, easy-to-share document using simple software on your Mac computer or Windows PC. Here's how.

You're able to build PDFs in the Preview tool too: As long as you have a PDF open in Preview, you can drag any file type into the table of contents sidebar on the left to add it as an extra page.

Want to search through / edit a scanned document on your Mac? Here's how to convert a scanned document into a searchable and editable PDF using Wondershare PDFelement.