Annotate a PDF — Highlight, Comment, Draw

Reviewing a contract or marking up student work in a PDF needs more than just a text editor. You want to highlight, scribble in the margin, point at things with arrows. That's what annotations are for.

Click any page, pick a tool — highlighter, sticky note, free-draw, shapes. Choose colors and sizes. Highlights stick to text properly, so they don't shift if the document gets re-flowed. Sticky notes show up as little icons that anyone can click to expand.

Once you save, the annotations are baked into the PDF. People opening it in Acrobat, Preview, or any reader will see them. They're not separate layers that get lost when emailing or printing.