Viewport Help Needed

[moo]

Hello everyone, I am new to Hammer Editor and map-making, and I need some help with this viewport problem I had. So when I opened Hammer Editor and looked through the viewport, I saw a full-screen button at the top and so I clicked it, and now I don't know how to make it smaller again. Does anyone know how to solve this? If so, it would be greatly appreciated that you tell me. Thanks, and have a good day.

 

[Sonoma]

Try this