Answer
You can add, change or delete a profile photo:
1. Click on your small profile photo or the shadow image in the top left of the navigation to get to your profile page.
Image
2. Now click on Edit business card to the right of your profile picture.
Image
3. In the editing mask, click on your profile picture or the shadow picture.
Image
4. Now you can upload, change or delete your profile picture. (JPG, BMP, PNG (max. 20 MB), recommended resolution: 1024 x 1024 pixels)
5. Save the changes and close the window with the done button.