Adding Marlin pre-heat constants for other filament types?

The configuration.h file contains pre-heat constants for PLA and ABS
Can you add constants for other filaments, and will they show as options either in software, or on the LCD controller?

You should be able to. Have you tried yet?

I tried without success. But that doesn’t mean that it can’t be done. It would be nice to be able to use the LCD to select HIPS, or Nylon in addition to PLA and ABS.