Collectible Card Game Headquarters

Hello.
I recently downloaded forge for android and made a commander deck but I can't figure out how to change the format of my deck to commander so I can use it, if anybody has a solution pls help!!!

No answer? Hope that someone can help me.

Open Forge and go to Deck Editor => Select the deck you created => Check the deck format: Change to Commander if not selected => Set a card as Commander: Select any card and click Set as Commander => Save.