a chord dictionary/encyclopedia that has both a c# section and a Db section etc

[blank00]

i have a decent keyboard chord dictionary but sometimes i wish that it had sections for both c# chords and Db chords or both f# chords and Gb chords rather than combining the two into one segment. In other words i would like a chord dictionary that does not combine 2 notes into one section. i realize that most people wanting a chord dictionary may not care about that, so there may not be one on the market but i just thought i'd ask.

thanks.

[keypeg]

I don't quite understand about chord dictionaries.  Like: There are major and minor chords, which in root position are M3 from bottom to middle, m3 from middle to top, P5 at the outer edges of the sandwich.  Why would you need a dictionary for that, when the piano is right in front of you?  How do people use such dictionaries? (New idea to me)

C# vs. Db - it's all enharmonic.  C# E# G# (looks like C# F G#)  Db F Ab.  Same piano keys.  You change the note names up one.  Why is this needed?