Breaking the composite connection

I have created some single glyph composites. Say A is a simple glyph and B and C are derived from it. I did this because I
want all three to have the same shape. Now I find that this is more trouble than its worth. I want glyphs A, B and C
to be independent of each other.
I’m sure this is easy to do but can find the way to do it in the Help.

It is indeed very simple — use “Make simple” on the toolbar.