Generic PCTG as custom filamant

In the system Filaments is PCTG noted and selected (see screen dump). I can not find a way to use this as the base of a new custom filament (or use it at all in studio). Is there somebody willing to explain how to use the “Generic PCTG”? Thanks in advanced.

X1C with AMS in LAN only mode



pctg3
pctg4

Click on a filament slot, select the Generic PCTG, click edit, make your changes and when you save it’ll offer you to name your new preset.