Translations:Booting Into PC-BSD®/9.2/4/en
From PC-BSD Wiki
F6 PXEBoot: F1
Your FreeBSD boot menu may vary if other operating systems are installed on the computer or if your system does not support PXE booting. By default, the computer will automatically boot into PC-BSD® (FreeBSD) after a few seconds unless you press another function key listed in the boot menu.