Ok so I can’t explain the whole theory about it but I’ll give an example how to use it.
Let take a chord progression like Am-G-F-E
You can play of course Minor Pentatonic or Natural Minor and Harmonic Minor as well.
But you can also play dim arpeggio on the E chord, you just need to play it half step up which means Fdim
Lets look at the notes : E chord —E G# B
F Dim —F G# B D
by playing F Dim over the E chord you coloring it with b9 and 7 degrees! some really cool Neo classical ideas can come out of this approach !