Re: Need to make a reference grid for a letter size page

You can use the filter factory plug-in (on the Photoshop CD in the Goodies 
folder) which appears under Filter->Synthetic with the following:

in the red channel:-
(x%2 && y%2)?r:0
green channel:-
(x%2 && y%2)?g:0
blue channel:-
(x%2 && y%2)?b:0

Change each occurrence of 2 to whatever you want the grid spacing to be.

You can get a grid of dots by changing the && to || and an inverse grid by

changing the r:0 to 0:r and so on.
The instructions for filter factory are on the CD too.

Andrew