Current questions and answers regarding the map editor.

Comrades!!!)) Help me out! I confess, yesterday I was a bit tipsy and clicked around in the editor (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.