Today’s question… “Can I set up the defaults so that they’re different for each camera and ISO rating? I want to set different noise reduction depending on the ISO rating.”
First, look in preferences, and double check that it’s set to use different defaults for each ISO and camera combination.
Then you need to find images for each ISO/camera combination, make sure everything else is set to your normal defaults, and set the noise reduction settings (or other default settings) that you want.
Once you’re happy with your chosen settings, go to the Develop menu and choose Set Default Settings…
Confirm the settings in the next dialog, and your new defaults are set.
Repeat for each of the other ISO/camera combinations.
From now on, any new images will import with your new default settings.