You can use the editing tools provided to add emphasis to certain words or phrases in your manual content by highlighting text. Highlighting the text will add a coloured (colored) bar behind the text and set it apart.
Select the text that you want to change.
Click the Back Color icon button on the Editor's toolbar. It’s the one with the capital A within a box.
Choose your desired highlight colour from the menu.
Once you click on it the text will be highlighted with the selected colour