Use the Text highlight tool 
to put a colorful, semi-transparent highlighting around the selected text. Like all other comment functions described above, highlighting also has a note window.
| 1. | Select the Text edit tool  in the Quick access toolbar. |
| 2. | Select the text that you would like to highlight. |
| 3. | Select the Text highlight tool on the ribbon tab Home | group Character to highlight the selected text or press Ctrl+G. |
| 4. | To add a comment to the highlighting, enable either the Text edit tool or the Hand tool  and double-click on the text. |
| 5. | If necessary, the fill color and opacity can be adjusted to the highlighting: |
| After you have used the Text highlight tool, you can click on the arrow of the icon to select More. In the dialog box that appears, set the desired options. For more information, see Text highlighting (Text highlight tool). |
Removing highlighting
Click on the highlighted text and use the arrow of the icon to select Remove Highlight.
Notes
▪The text highlighting, like other comments, is located at its own level "hovering" above the page. The highlighting does not automatically follow the text if you edit it later.
▪If only optical highlighting is involved, you can also use the underline function that can also highlight the relevant text in color and which "accompanies" text changes. For more information, Underline and strikethrough.