[sciurius]

> No, I see it differently.

That's ok ☺.

> The chords should be in the chordpro-file as they should sound and in the display as they are played.

Fortunately MSPro and ChordPro provide several ways to achieve either approach.

For example, in ChordPro (www.chordpro.org), either guitar-centric:

{capo-guitar: 2}
{transpose-keyboard: 2}
[A] will show as A with capo 2 on guitar and B on keyboard.

or keyboard-centric:

{capo-guitar: 2}
{transpose-guitar: -2}
[A] will show as G with capo 2 on guitar and A on keyboard.