What you need
- A PDF under 5 MiB (25 MiB on Pro), up to 100 pages
- A desktop browser (upload and download only on a phone)
- Text you can select — not a scan
- A free account, with a confirmed email, to download
The marking tools
- Highlight (H): click at the start of the line, then stretch the bar over the words. Colour is in the panel.
- Draw (P): circle, tick or underline. The pen stays ready; Esc returns to Select.
- Shapes: Rectangle (R), Ellipse (O), Line (L), Arrow (A). Draw them round text, not over it: a pale fill covers what is under it.
- Note (N): click beside the clause and type. Pick a colour to tell yours from someone else’s.
Export PDF and check the marks; a highlight on the wrong line is obvious on paper. Your file is never overwritten.
Related: annotating a PDF, sign a PDF, edit the text in a PDF.