which config.txt for Raspberry Pi ?

i got some problems with my raspberry pi on the PiTop.
whenever i switch modes, i loose display: no screen anymore until power off/on again.

can some kind soul give me a list of what should be in the config.txt file to configure the screen of the PiTop,so it allowsthe Raspberry pi to do autoscale of the output?

All helpfull advice is welcome.

For the Pi-Top v1, Jon Abbott suggested these settings. You’ll need to use the AnyMode module as well, but I expect you already knew that.

The Pi-top v2 has a 1920×1080 display instead of 1360×768, so needs slightly different settings. According to the Raspberry Pi website the settings for a 1920×1080 screen are:
hdmi_group=2
hdmi_mode=82
but as I don’t have a Pi-Top I don’t know for sure whether they will work.

Thank you. This helped.