Lenovo T24t-20 23.8" 16:9 Multi-Touch IPS Display - Manual (Page 28)

Please select the Control Back (VDM) option in OSD based on your requirement.
This monitor Power Button Control function is compatible with some Lenovo devices, the
compatibility list please refer to the link:
https://support.lenovo.com/docs/t24t_20_vdm_comp_list
If monitor power button can’t work normally with the systems that supports the VDM
function, please update monitor’s firmware with Lenovo Display Control Center
ThinkColour and ensure the system’s BIOS/Drivers are up to date.
Chapter 2.Adjusting and using your monitor 2-11