Press 1 to enter the POST menu during boot press 2 to enter BIOS during boot wait until booting finishes to go into OS also remix and remove the SETUPENABLED to 1 on green flag pressed to not have to do setup every green flag click (or just use the built in reboot) BIOS is lenovo by default (in memory of my Lenovo ideapad 700-15ISK)
BIOS/UEFI + OS = COMPUTER BIOS has not been added yet, and OS installation Pack will release soon (if your os was trashed or no OS at all you would see a blinking _ in the corner after bootup.)