Getting Bios Settings of Toshiba Satellite U920T

I was wondering how to get to the bios settings in order to change the boot menu from SSD/HDD to USB. I tried F2, F1, Del and Esc but I was in no success

In order to go to bios settings I did the following trick after Hit and Trial Method

I restarted my system having Windows 8 installed and then kept the F2 pressed when it was off till it started booting and I got the menu, 
(make sure to press F2 before turning on the computer and not after it starting the boot).

So in easy way when your system is turned off, press F2 and then turn on the power button keeping the F2 pressed

With this you will get into the booting menu.