I can't highlight part of the text

Sometimes, Perusall isn't able to identify the full underlying text structure in a document, and so the text highlighting tool doesn't work as expected. As a workaround, you can always use the figure highlighting tool to either (1) click to drop a map pin anywhere on the page, or (2) click and drag to create a rectangular highlight anywhere on the page.

To switch to this tool, select it in the toolbar:

Annotate figure screenshot