Highlight research papers, and keep the note on the page

What you can do

• Highlight in yellow, green, blue, pink or orange, or pick any custom colour.
• Add a note while highlighting, or later from the highlight’s card.
• Hover a highlight to read, edit, recolour or delete its note without leaving the page.
• Right-click a highlight for the same actions and Copy quote.
• Read with zoom in a light, dark or system theme; the PDF page stays white.
• Resize the side panel by dragging its edge; it remembers the width.

How it works

1. Select

   Drag across the words you want, as in any PDF reader.

2. Pick a colour

   Choose one of five presets or a custom colour. Violet is left out: it means AI.

3. Write, if you want

   Add a note now or later. It stays attached to exactly that passage.

Tips

• Give each colour one meaning and keep it: for example yellow for claims, green for methods, blue for numbers.
• Highlight less than you think. A highlight with a one-line note is worth ten without.
• Use Copy quote when writing, so the quotation matches the paper exactly.

Works well with

• Anchored notesEvery note keeps its page and passage, and says who wrote it.
• Ask a paperChat with a paper; every answer cites the passage it used.
• Follow a citationHover [51] to see which paper it is, then open or add it.

Guides

• How to read a research paper efficiently — The three-pass method, what to skip, and how to keep what you read.
• How to take notes on research papers — Notes you can find again and trace back to the passage they came from.