This article is in the Studio section of the App.
When designing in Studio, you are able to undo and redo changes that are made.
For example, if you'd quickly like to undo a panel group you just created, press cmd(⌘) + Z , ctrl + Z, OR clicking the undo button in the bottom left corner.
You can also then redo this by pressing cmd(⌘) + Y, ctrl + Y, OR the redo button in the bottom left corner.
Note: If multiple changes are made while the system is calculating then pressing undo will undo all of the changes.