Adding notes and tags to precise parts of the text or regions of an image is the heart of A.nnotate. You just select some text, write a note in the box that appears and click 'save'. For regions of an image, you can drag out a rectangular or oval region.
Notes on text and images
Words or phrases in PDF or Word documents can be annotated.
Highlight, Strikethrough and Insertion styles for text annotations.
Rectangular and oval regions for images.
Colors and tags help structure your notes.
Replies on annotations by other users.