How to edit document background?

To add and edit document background, please follow the steps below:

1. There are two ways to start editing document background.

• Select the page you want to edit background. Tap on the "Edit" button in the bottom toolbar and press the "Background" button.
• Tap on the screen to show the document to fullscreen. Press the "Background" button at the bottom of the screen. 

2. Tap the edit tool in the toolbar at the bottom of the screen, then start designing.
The toolbar has buttons to change background color, add texture, and insert pictures and shapes.

• Change background color.

• Add texture.

• Insert pictures
  

• Add shaps.

3. Press the "Done" button in the top right corner to confirm changes.