Underline Text Tool
The Underline Text Tool permits you to underline the selected text.
Note however that you cannot Underline 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 Underline Text Tool, click on the menu item, and a selection cursor will appear.
Click and drag the selection cursor over the text to be underlined. When you release the mouse button, the selected text will then appear to be underlined.
Right-clicking inside the underlined area will open the pop-up menu where you can add a pop-up note.
N.B. If you select the Delete option from the pop-up menu, only the underlining will be deleted. The underlying text is not changed in any way!