A. Access BIOS using Settings
- Open Settings.
- Click on Update & Security.
- Click on Recovery.
- Under the "Advanced startup" section, click the Restart now button.
- Click on Troubleshoot
- Click on Advanced options.
- Click the UEFI Firmware settings option.
- Click the Restart button.
B. Access BIOS using boot key option
- Press the Power button.
- See the screen splash to identify the key you must press to enter the firmware).
- Press the required key repeatedly until you enter the setup mode. Usually, you need to press the ESC, Delete, or one of the Function keys (F1, F2, F10, etc.).
C. Manufacturers oft provide utilities that let you access many BIOS settings from in the OS. You can even upgrade the BIOS from within your OS.
Now personally, I prefer a more hands on approach doing it in the standard way as it's just more familiar. And in the early days, there were issue and one could easily mess things up with these things. But in the last decade, while the rumors of horrible outcomes persist, I have not been able to document a problem in at least 7 or 8 years.
Gigabytes utility was called "Touch BIOS" at some point, after EasyTune .... not sure what it is called today.