Everybody knows that it's much easier to find a person you want to send a message to if this user has a profile picture.
To update your profile picture, follow these steps:
Click on the circular avatar in the bottom left-hand corner of Leverice;
Click "Upload Image" or drag and drop your picture into the gray "Profile Image" area;
Click "Select files" or drag and drop your picture into a grey square in the center of the window;
Choose a picture from your computer and click "Open" (if you chose "Upload Image" -> "Select files"!);
Tick the workspaces you want to update your picture in (on the right);
Your profile picture is updated!