What are the indispensable custom parameters one should add to a font?

[rosaiani (Rodrigo Saiani)]

What are the indispensable custom parameters one should add to a font?

[mekkablue (Rainer Erich Scheichelbauer)]

Depends. A font can be just fine without CPs. Have you seen this: http://glyphsapp.com/blog/custom-parameters/

[rosaiani (Rodrigo Saiani)]

No I haven’t, will do right now, thanks!