You can change your OP3N account's avatar / background by following these steps
Platform
Desktop/Mobile Web (https://op3n.world/)
- Login to OP3N with your account
- Go to Profile and then Edit profile
- Click on the Edit icon 3 (avatar) or 4 (background) to change
- Select image location to upload
iOS & Android
- Login to OP3N with your account
- Go to Profile tab then tap on the avatar (2) / background (3) to edit
- Tap ... at the top-right corner
- You can Take a Picture with your phone camera or Select picture from Local Library to upload