RE: customize-apropos

[Drew Adams]

       Besides, this is not about _using_ the variable ("use only if"); it
       is about changing its value

    You should look at that text in a Custom buffer.

I have.

    The text occurs _next to the State button_.  "Use only if" refers to
    the State button.

OK, but the text is a bit ambiguous. In spite of its position in the buffer,
I misinterpreted it. IOW, the text could be clearer: "Change the value only
if..." or "Change the state only if..."