A toolbar at the top of the Details pane contains buttons that enable you to configure the selected virtual machine, or to create a new virtual machine.
The toolbar includes the following buttons:
New. Creates a new virtual machine, and adds it to the machine list.
Add. Adds an existing virtual machine to the machine list.
Settings. Displays the Settings window for the virtual machine, enabling you to make configuration changes.
Discard. For a running virtual machine, discards the saved state for the virtual machine and closes it down.
Show/Start. For a running virtual machine, Show displays the virtual machine window. For a stopped virtual machine, Start displays options for powering up the virtual machine.