UEFI (BIOS) designs are a delicate mix between allowing the user to make system changes quickly and displaying information the user needs. The Gigabyte UEFI has been redesigned to add flyout menus for system status and change the overall look. Gigabyte also added an easy mode menu that shows even more information about the system and really should be displayed on all of the advanced menu screens.
Sadly the new design doesn't have page titles or a breadcrumb trail so finding where you are in a particular menu can be a little tricky.
Below are some of the more interesting screens found in the Z270X Gaming 5 BIOS.(in no particular order)
As with all BIOS menus it is a good idea to root around and identify all of the settings you are looking for and discover what their dependencies might be.