An annotation is a note or comment added to a PDF document. You can add annotations using the document viewer.
When you open a file, you should have a side pane on the left side of the window. If you do not have a visible side pane, click View ▸ Side Pane or press F9.
At the top of this side pane, there is a drop-down menu with options like Thumbnails, Outline and Annotations (some of which may be dimmed for some documents).
To create an annotation:
Select Annotate the document from the title bar.
You should now see Add text annotation and Add highlight annotation bottons below the title bar.
Click on the first icon to add a text annotation.
Click on the spot in the document window you would like to add the annotation to. Your annotation window will open.
Type your text into the annotation window.
You can resize the note by clicking and holding the left mouse button on one of the bottom corners of the note, and moving it around.
Close the note by clicking on the x in the top corner of the note.
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