The theme picture of the restaurant's website gives food clients a unique flavor of the actual menu and builds anticipation for ordering online.
The restaurant can access the "Theme Picture" section in the menu editor (Menu Setup and receive orders -> Menu setup -> Theme picture). See below:
Then access widget modules like this for menu background images:
The restaurant will then be able to change the following images for additional menu design (on the condition that they follow the sizes listed below for each of them):