The main features I want are:
- Import PDFs and annotate them in the app’s native format (so that I’ll still be able to remove previous changes after I save and re-open it)
- Quickly add text boxes anywhere on the PDF
- Draw some basic shapes and lines with different colors (can either be notability-style “draw and hold to make shape” or just a classic “insert shapes” option from the toolbar)
- Have a page thumbnail option and can search text in the PDF file and quickly go there
But MacOS’s pdf editor saves the file as PDF, which means I can’t change a text box or drawing I already did once I save the file and delete previous versions. And I’m planning to switch to linux in the future so I want something open source.