Current questions and answers regarding the map editor.

Guys!!!)) Help me out! I confess, yesterday, while drunk, I clicked on something in the editor (I decided to make a map), can you tell me how to bring back the panel on the left, so that when I click on a hero, a panel appears on the left, allowing me to replace him with any other hero. I vaguely remember that it's simple, but I can't recall... Please understand and forgive me)) It was our wedding anniversary.