You can add a new photo in your profile settings or choose an already uploaded photo as a profile photo.
Desktop version:
Please log in to your account and click the portrait icon in the top right corner of the page, then select “Your profile” from the menu. This will take you to the profile page. Click "Add profile photo" button to add / change the profile photo.
If you want to set an already uploaded photo as the main one, just click on it to open and press the "Set as main" button.
Mobile version:
Please log in to your account and click the portrait icon in the lower right corner of the page, then select "View my profile" and click on the camera icon to add / change your profile photo.
If you want to set an already uploaded photo as the main one, just click on it to open and press the "Set as main" button.
Please note that the size of each file should not exceed 7MB. Additionally, images must not be smaller than 333 by 333 pixels. Acceptable file formats are JPG, GIF or PNG.