How to annotate a PDF on Mac
Use JemPDF to highlight a passage, leave a note in the margin, or draw on a PDF. The app saves your marks as PDF annotations so you can open the file in another compatible reader.
Highlight text and add a note
Open the PDF and choose a tool
Open the file with ⌘O or drag it into JemPDF. In the Annotate toolbar, choose Highlight, Underline, or Strikethrough.
Mark the passage
Drag across the text and release to apply the mark. To add a comment, choose Note and click where you want it on the page. You can reopen the note to edit it.
Save the annotated PDF
Press ⌘S to save your changes to the PDF. Use Save a Copy if you want an annotated file alongside the original.
Mark up a scanned PDF
Text highlighting requires selectable text. If a scan contains only images, use the drawing or text tools to mark the page or add a note.
On iPad and iPhone
Open the PDF from Files and use the annotation controls in the reader. On a compatible iPad, you can draw directly on the page with Apple Pencil.