I know you can save these alterations as a project default, but you may have to additionally do this on a chord by chord basis for other chords that you want the alterations to have the 75% change. But at least once it is done, every iteration of the changed chord will be correct and consistent.
Can these defaults be saved across other projects? Probably only by doing a “Save As” to make it act like a template.
Have you seen Anthony’s video on the process of making chord appearance defaults?