Highlight Text Tool
The Highlight Text Tool permits you to highlight text within the PDF document, and works like the Select Tool.
Note however that you cannot Highlight image based text!
For example if you scan a page to PDF - there is no text in that file can be modified - only image based content!
To use the Highlight Text Tool, click on the menu item, and a selection cursor will appear.
Click and drag the selection cursor over the text to be highlighted. When you release the mouse button, the selected text will then appear to be highlighted with color, like a highlighter pen.
Right-clicking inside the highlighted area will open the pop-up menu where you can add a pop-up note.