1. Log in to 500px.com
2. Go to Accounts Settings.
3. In the box titled About You click Choose File button.
4. Select a file to upload.
5. After selecting the file, click Save changes at the bottom of the page.
Note: If changes don’t apply, clear your cache and cookies in browser settings. File uploaded has to be JPG/JPEG, to avoid automatic resizing upload a custom photo at 500px x 500px resolution.