Above 4G Decoding; Option Rom Messages; Interrupt 19 Capture; Setup Mode - Asus STRIX Z270F GAMING Bios Manual

The following item appears only when you set the Boot Logo Display to [Auto] and [Full
Screen].
Post Delay Time
This item allows you to select a desired additional POST waiting time to easily enter
the BIOS Setup. You can only execute the POST delay time during normal boot. The
values range from 0 to 10 seconds.
This feature only works when set under normal boot.
The following items appear only when you set the Boot Logo Display to [Disabled].
Post Report
This item allows you to select a desired POST report waiting time.
Boot up NumLock State
This item allows you to enable or disable power-on state of the NumLock.

Above 4G Decoding

This item enables or disables 64-bit capable devices to be decoded in above 4G address
space if your system supports 64-bit PCI Decoding.
Wait For 'F1' If Error
This item allows your system to wait for the <F1> key to be pressed when error occurs.

Option ROM Messages

[Enabled]
[Disabled]

Interrupt 19 Capture

[Enabled]
[Disabled]

Setup Mode

[Advanced Mode] This item allows you to go to Advanced Mode of the BIOS after POST.
[EZ Mode]
60
The Option ROM Messages will be shown during the POST.
Only the ASUS logo will be shown during the POST.
Execute the trap right away.
Execute the trap during legacy boot.
This item allows you to go to EZ Mode of the BIOS after POST.
ASUS STRIX Z270F GAMING BIOS Manual