How do I add an outline to scanned PDFs and handwritten notes?

How can I edit inserted images?

Why can't I select text in my PDF?

Why does the highlighter not show up on a black background?

Will modifying a PDF in Notein change the original file?

Why does the brush appear thinner when writing after zooming in, and why doesn't the brush size change with zoom?

Here are some common issues you may encounter: