- After your text is on the screen, click Shapes to the left of the screen (under the More section) and select the rectangle shape
- Click on the Fill color option - change to the highlight color you want
- Click on the Outline color option - change to the highlight color
- Click on the rectangle shape again to place it on your text box
- Click on the shape image in the middle of the screen to select it and at the top of the screen click Arrange
- Select Send to Back, which will move the color behind the text
- You can drag the size of the shape to cover all of your text
