• In the Page Tab click on Background.

• Click on the three dots in the right upper corner to open more options.

• Choose which pages need a new background.   

• Click on the circle to choose a color. 

Alternatively, you can choose an image file to use as the background for your documents.

• Click on Image.
• Click on Browse to select an image file.  

Once you have added the image it will appear in the preview section.

• To delete the uploaded image, click the bin icon.

• Set the image Scaling to reduce or enlarge it.

• Click the Make Default button to use the selected settings moving forward.
• Click on Apply at the bottom to change the background.