1. After entering steam, click on your avatar. This is your account name.
2. Then choose to view my profile, which is the first one.
3. Then find the editor's profile in it, just to the right of the avatar, and go in.
4. Pull it down and find your background information if you have a background map.
5. Then choose your personal background, choose the pattern of the five-star red flag inside, and click Finish.