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How to add logo?
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1. Go to user profile
2. User  view " User icon settings"
3. Click "Upload" button, user can choose any images. User can click the info icon and view params for images
4. User can save image. if click "Save" button
5. You can return default profile logo, when user click "Set default" button. In this case profile logo will consist on first letters of first and  last name