I AM WORKING WITH LINE CHARTS AND I WOULD LIKE TO CREATE A TRANSLUCENT IMAGE THAT INCLUDES ONLY THE GRID WITH THE GRAPH (CHART) AND HAS NO COLOR BACKGROUND SO I CAN COMBINE AND OVERLAP VARIOUS GRAPH IMAGES AND COMPARE THEM VISUALLY. IT IS KIND OF LIKE DRAWING ON THE PLASTIC FOILS SO YOU CAN LATER PLACE THEM OVER ANOTHER IMAGE TO SEE BOTH AT THE SAME TIME.
I HOPE I DESCRIBED MY PROBLEM CLEARLY.
PLEASE HELP!
p.s. I AM LOOKING FOR A SIMPLE AND EASY WAY, IF THERE IS ONE, BECAUSE CUTTING OUT PIECES OF A SQUARE GRID ON THE CHART AND OUTLINING THE GRAPH LINE MANUALLY WOULD BE TIDIOUS AND NEVER-ENDING JOB, ESPECIALLY WHEN I HAVE TO WORK WITH NUMEROUS CHARTS FREQUENTLY.
THANK YOU IN ADVANCE!
CRHAWAII

there is no easy way, you should of done it on a clear/transparent b/g, but i may have a tut' that can help, brb

OK I found it,
http://www.hallcross.co.uk/free%20stuff/TUT'S/tuts.htm
transparent_image.swf
right clique > save target as,

OK jmh, you gotta allow longer URL's
copy and paste ;(

Try the multiply blending mode.