I am trying to change the nozzle diameter for a printer setting; all the other settings should stay the same. The setting is greyed out under the “Extruder” tab.
Another option would be to copy all printer settings to a different nozzle size profile: open old profile, copy setting one, close profile, open new profile, paste setting one, close new profile, do this 256 times.
huh?
Here’s an image… extruder type and size are greyed out.
I created a few custom presets, based on the original bambustudio presets, however I can’t see a way to change the nozzle size. I created custom G-Code, I would just like to get a custom preset I created, with G-Code adjustments and all that, and use it for a different nozzle…
You pick the nozzle size then adjust whatever you’d like. In the example you have .4 copied, then change whatever, save with name you need, rince repeat.
Same for .6, .8, .2
Yeah, I know that part… the thing is if I update G-Code or any other option, then I have to update every nozzle size preset to match, and that’s prone to mistakes.
I thought there was an easy way around it. Thanks for chipping in!
I don’t understand 
You get the g-code after you sliced the model.
Maybe I got wrong but:
If I load a model/3MF file I can choose whether I want to use the settings that come with it or discard them.
Problem is physical limitations…
Let me try to explain so see whether or not we are on the same page here…
A 0.2mm nozzle for example can’t print in 0.24mm draft layers like a 0.4mm one.
Speeds and other vital settings also won’t fork out for the same reasons.
If you goal is to somehow keep print settings for different nozzle diameters than I don’t think this will work in any feasible way.
Try it the other way around:
Create well calibrated filament and default nozzle pre-sets.
E.g: 0.2mm PLA high quality, 0.8mm PETG vase mode, …
A bit of work for sure but in the long run well worth it, especially if you have a reliable filament supplier.
The filament profile makes sure you have the those flow ratios, temps and k-factors hone it as good as possible.
The well tuned base print profiles created for each nozzle size you use allow to quickly change what might need changing and if used often just save it once working well under a meaningful name, like 0.6mm extra strong CF…
If all those well tuned custom profiles get too much one day you could even automate things.
As in writing a small batch file to replace those profiles based on the filament type you select to then start Studio with just your PLA configuration or whatever suits the need.
But as said, I might have missed your point by thinking in the wrong direction so please correct me if required 
I should have been more explicit, and I apologize. When I create a printer profile, sometimes I update the machine G-Code (see image below) to suit certain specifications (for example: purge more filament at the beginning, don’t do the vibration compensation test, code that gets executed at the beginning of every layer,…). I can save the various profiles as preset printer settings, however only for a certain nozzle size. If I want to save a specific preset and use it for a different size nozzle, I can’t, since I can’t change the nozzle size in the preset.
Now that I am writing this, I realize there might be some values dependent on the nozzle size, and that might be the reason why we can’t change the nozzle size in a printer settings profile. I am not sure.
Thank you for the reply - I like debating these things, as conversations spark new ideas. Even if it doesn’t achieve what I needed, I might take you up on creating better filament profiles since I’m narrowing down on filament types and suppliers.
I had thought you were taking the stock .4 nozzle profile and then editing for your .4 needs. Saving
Then taking the .6 and doing that for the .6 needs and so on.
Forgive me, I haven’t changed gcode in a bit, set my start and end and have left it alone, so I’m not well versed in what your doing, although I think I’ve wrapped my head around it.
Then again, maybe not, lol.
)