To make working inside a Virtual Machine more comfortable, you can run a guest operating system in fullscreen mode. When running a Virtual Machine in fullscreen mode, guest OS screen occupies the whole monitor of your computer; primary OS with its applications and the Parallels Workstation menu, toolbar, and status bar are hidden.
Note: You can start a Virtual Machine in the fullscreen mode if the Switch to fullscreen mode automatically option is set in the VM Flags tab of the General Options.
If you want to switch to fullscreen while running a guest OS, do one of the following:
Alt+Enter by default, unless you have defined other hot key).To return to the windowed mode:
Ctrl+Alt or Alt+Enter by default). Hot key combinations are defined in the Hot Key Combinations tab of the Preferences window.