Collectible Card Game Headquarters

I'm a new Forge user, and I enjoy playing EDH. I was wondering how to put your commander in a deck that you build. I built a deck and put my commander in the sideboard (like xmage). Any help would be appreciated!

Easiest way to do it is:

Constructed, click the Commander check box, click the box that says "Commander Deck Editor".

Change your section to "Commander" (not Sideboard) and add it there.

On my system you have to scroll to the right to see the commander edit button which is not visible. When changing sections the commander area doesn't say commander anywhere but you will be able to right click on your card searched card and set it as commander if you are in the right section.