Asus Q87I-PLUS/CSM Manual page 68

Discard Changes & Exit
This option allows you to exit the Setup program without saving your changes. When you
select this option or if you press <Esc>, a confirmation window appears. Select Yes to
discard changes and exit.
ASUS EZ Mode
This option allows you to enter the EZ Mode screen.
Launch EFI Shell from filesystem device
This option allows you to attempt to launch the EFI Shell application (shellx64.efi) from one of
the available devices that have a filesystem.
2‑40 Chapter 2: Getting started