>gadget(knobs)
>gadget(knobs,lights,dials)
>gadget(dials,dial_light,dial_needle,dial_range)
>


I had a similar problem writing my wall macro.

What I did was to have as macro parameters only those
fields necessarry. At the beginning of the file with the macro in,
I declare variables for the optional stuff to a default. The
user can then redeclare the variables before calling the macro.

eg

// file macro.inc

#declare Var1=0;

#macro ThisandThat(Vara,Varb,varc)
....
// Use var1 somewhere here
....

#end

Works fine for me, also solves the problem of not being able to
remember which parameter comes first.

Gail
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