Short answer: open the PDF in PDF Reader Lite, choose the highlight tool, mark the important text, add notes or pen marks when needed, then save or share the reviewed document. The app is free forever.
Step-by-step annotation workflow
- Open the PDF. Start from the home screen, recent files, favorites, or Android file picker.
- Go to annotation tools. Choose Highlight when you want to emphasize a sentence, number, clause, or approval point.
- Mark only the important text. Highlighting every paragraph makes the document harder to scan. Keep highlights focused.
- Add notes for context. Use a note when the highlight needs a reason, next step, or question for another reviewer.
- Use underline, strikeout, or pen marks when appropriate. Different marks help separate facts, corrections, and handwritten review comments.
- Share the reviewed file. Export or share the PDF when your review is finished.
Which annotation tool should you use?
| Tool | Best for | Example |
|---|---|---|
| Highlight | Important passages that should stand out. | Payment amount, contract clause, exam answer, report finding. |
| Note | Comments that need explanation. | "Confirm this number before sending." |
| Underline | Light emphasis without covering text. | Names, dates, references, or definitions. |
| Strikeout | Text that should be removed or ignored. | Outdated line items or rejected wording. |
| Pen | Freehand review marks. | Circles, arrows, initials, or quick sketches. |
Tips for cleaner PDF review
- Use one highlight color for the same type of decision across a document.
- Keep notes short so they are readable on small screens.
- Review highlights before sharing so accidental marks do not go out.
- Use search to jump back to repeated names, sections, or invoice numbers.
Free promise: PDF Reader Lite is free forever. Highlighting, reviewing, signing, sharing, and everyday PDF tools do not require a subscription or paid trial.
FAQ
Can I highlight a scanned PDF?
If the scanned page is an image, text selection may depend on whether the document has recognized text. You can still use pen marks or notes for visual review.
Can I add comments after highlighting?
Yes. A practical workflow is to highlight the passage first, then add a short note explaining the decision or next action.