Log in to your account on https://app.mangodisplay.com.
Choose the display you want to edit.
Click '+' on the lower right corner of your display to add a widget.
Then choose 'Image'
You have different options to choose from:
a. Mango Backgrounds - images coming from the Mango Display gallery
b. Unsplash - random images from unsplash.com with categories such as nature, animals, architecture, travel etc.
c. Google photos - you can connect your google photos account
d. Apple photos - enter an iCloud shared album link
e. Single image URL - add a link from Dropbox, Google drive, website image etc.
Once you've chosen your image, you can edit the image settings such as crop, brightness and transition then click 'save'!
*This is how your image widget would look like