Tutorial user

Brand new user, doing the tutorial, but I cannot find how to undo the split screen. It switches the active screen up and down as I work through it. Okay hope you can help me.

Briar Kit was kind enough to send me a msg and tell me to check the controls on the right hand corner. Hahaha. I tried every other control and looked and looked for something. Well now I know. Thanks to Briar Kit! :smiley: