Can any chord be created in Hookpad

I see the basic chords of a key are included, however, are there ways to create other chords? Quite simply, can any chord be created?

thanks so much, Gary

@Garyo you can borrow from any of the diatonic modes (plus harmonic minor) and make secondary chords (V/V, V/vi, etc.). You can also suspend chords, add 7th, 9ths, 11ths, and # and b them. I wouldn’t say any chord is possible, but most reasonable chords that can be built within a functional (western, common practice) system.