Grid lines, GDP- need some help

[Jay Hamilton]

I'm working on section 1.7 for GDP, and nearly done with 1st pass.  I've come 
to the grid lines section 1.7.2.2 and need help understanding the code so I can 
explain it because there's too much there that is not explained.

Does anyone have an example with
%here's why this is here
annotations that you could send me?

Thanks



Yours-
Jay

Jay Hamilton
www.soundand.com
206-328-7694