Invoke [Custom File] for information...
Invoke [Help] for general information.
Changing the look of this buttons to just underlined text would improve
things a lot. They are really just links. Changing "Invoke" to "See"
would make it less of a guessing game too.
*** 2) When you click on the "Help" link (button) then the info node
"(emacs) Easy Customization" is displayed. I believe the
customize-apropos-* functions should be mentioned there, right after
"Groups" in the menu at the bottom.
These two changes are ok with me. Could you post a patch?