Click on the "My Profile" menu and choose "See My Profile"
Click on the profile photo field.
Select the "Upload photo" option.
Select your photo from your computer, click "Save" and you're done.
Dimensions and Rules:
Optimal size: 200px - 200px
Accepted formats: .png - .jpeg
File size: Max. 3Mb
Keywords: profile picture, profile photo, upload photo, delete photo