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, Index and Annotations (some of which may be dimmed for some documents).
To create an annotation:
Select Annotations from the drop-down menu.
You should now see List and Add tabs under the drop-down menu.
Select the Add tab.
Click on the 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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