As a default option, for those who want a default chord set, this can be done by presets which are assigned to keys. Two questions. What chords provide a reasonable base set? And should there be a default chord assignment?
As a base set, based on my guitar studies, I suggest the following in order of important: major, minor, dominant 7, minor 7, major 7. After that I suppose it’s what style you’re trying to play.
A nice alternative to having to specify all the notes for a chord, as in my previous post, would be to have a chord selector with the default/built in chords. This might be an added two selectors on the tuning page, one for the chord base, say G, and another for the type, say major or minor. But the ability to specify each note is more more flexible and should be retained.
As to the second question, the default chord assignment, there’s nothing that will satisfy everyone. The simplest might be to assign each fret row to a given chord base. That give 6 chords per row. Say the 5 I’ve listed above plus one other. Or only have 5. So the row near the nut would be A or C, depending on how you want to start. If it’s like a piano, it would be C. Followed by C#, D, D#, etc. A nice add on would be to allow the capo to cycle the frets. If the first was C, then the first capo setting would make the first C#, and so on.