There are several options available in the upper-left menu of Full Disk Encryption Preboot.

Full Disk Encryption Preboot Menu Options

Menu Item Description
Authentication
Change the authentication method used to log on to Endpoint Encryption devices.
Communications
Manually synchronize with PolicyServer.
Computer
View information about Full Disk Encryption, view your network information, change the keyboard layout, access the on-screen keyboard, or restart or shut down the endpoint.