You can add a colored background to text items to increase contrast or better display the text. The background size can be adjusted by changing the text box size.
To add a background to your text box in the PosterMyWall editor:
- Select any plain text box on your design.
- In the right contextual menu, click 'none' beside Background and change it to color.
- Select the color box to change the color, and move the opacity slider to adjust the box opacity.