On Desktop:

  • Select Settings on the top-right menu under the profile image.
  • Navigate to the Profile section.
  • Hover over the default image until Update Pic appears.
  • Click on Update Pic, upload your new photo, then select Update

On your Android device:

Tap on the default image under Settings and upload the desires picture.

On iOS device:

Click on Shares or Storage, then tap on Settings listed at the bottom of the page.