Quick help to those who are new to CornerTable. There is a small learning curve to changing profiles.
The fastest way is to go to your main profile and besides your profile (only you can see) is the edit button.
You can adjust your privacy, make changes and more.

To change your background, avatar and header (I'll post this in the tech group for anyone to share with others).

Go to Edit or choose your profile from the upper right-hand corner (using the desktop).

From the drop-down, choose "Design"

You have two options then.

"Design" is for the background.

Upload the image. Save THEN close the settings otherwise, it won't take.

The same with the profile and header.

There are minor differences and its worth exploring the settings and playing around.

Now the fun part is if you create a page, you can change the background of the page as well.

I hope this helps someone and welcome!