how to enable the documented Optimized Administrator settings in TC-1660 bios?

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fugadug
fugadug Member Posts: 168 Skilled Fixer WiFi Icon

snippets below from TC-1660 Service Guide and BIOS show
this BIOS provides a means to select memory timings
this BIOS has Optimized Defaults via an Administrator mode

I want to change the less-than optimal 2933MHz dram timing to 3200MHz
which both this i5-11400 cpu and DDR4-3200 dram supports.

but I don't see any way to get into an Administrator mode in the BIOS.
how do I enable this Admin mode?