How to Write over all opentype feature class and feature code in one fell swoop?

I have a set of 8 fonts in a family but the feature code is not consistent. What is the best way to replace each one with a new desired set?

Several options:

  • automate as much as possible. If glyphs have respective suffixes, the code can be automated. E.g. x.ss01 will trigger ss01 feature.
  • if you have lots of manual code, select the features in the sidebar, copy, and now paste in the other font’s Font Info > Features.

If the code needs to be in sync, try the mekkablue script Compare > Compare features. Lists all diffs between two frontmost fonts in macro window.