How to access BIOS on a Lenovo Yoga device?
Turn off the laptop, then use a thin pointed object like a toothpick or a paperclip to press and hold this button for several seconds. A menu will pop up, where you need to select the desired feature, in this case – BIOS Setup. Enter BIOS and adjust any setting you want, like changing the hotkey mode, which swaps the behaviour of Functional keys. Now pressing single F1-F12 key will act like a F1-F12 key, and pressing them while holding Fn key will activate the hotkey function, like adjusting volume, turning airplane mode on and off and similar features.