Key editor, chord pad ant the mixer window all have there own window.
The chord pad window is intergrade in the arranger window.
I suggest to gif more option to this window. Add tabs to this chord pad windows so you can switch to other windows like the mix console, key editor, channel strip, quick control, chord pad ant the analyzer window.
I the future steinberg can add more windows ant it will gif the user the option to switch quickly from window to window giving fast acces without being in the way leaving the arranger window always in front of you.
Resizing wil be posible.