I seem to have got Cura into a state where changing the material has no effect on the settings. I am a beginner with Cura, and I would like to understand what I've done wrong, and how I can undo it.
My part is meant to be printed in PETG, but I first did some test prints in PLA to get all the non-material related settings right (e.g. infill, top/bottom pattern, etc.). When I changed the material from "PLA" to "PETG", it gave me a popup saying that I had changed these settings and asking me if I wanted to keep or discard the changes - I selected keep. I'm pretty sure that temperature, fan speed etc. weren't on that list of changes, otherwise I would have pressed discard.
However, the temperature, fan speed etc. also didn't change, they all stayed at their appropriate values for PLA. This effect seems to be permanent - they stay at their PLA values even if I select 'Settings -> Profile -> Discard current changes' from the menu, or if I select the 'Draft' or 'High' profiles, which I haven't yet used.
I noticed also that if I go to 'Manage Profiles', I find that all three profiles include settings for the material, including a 200 degree printing temperature and a 60 degree bed temperature. I guess that these are overriding the settings associated with the material. I guess that these settings are not supposed to be in the profiles, so I want to understand how they got there and whether/how I should remove them.
It's possible that I did manually change those temperature settings for some previous print - but I wouldn't have expected that to have such a permanent effect.