If you want to do a gmail background change to a photo then you must follow the steps that are given below:-
1. The initial step is to log in to your account and click on the Settings option from the top corner of the screen.
2. Now scroll down to the Theme section and click on the View All option on Quick Settings.
3. Then scroll down and move to the My Photos section in the Pick your Theme panel.
4. Now finally select your photos from the profile photos or gallery.
