Originally Posted by SparrowHawk7
Ah yes .. I forgot about that. Simple solution. When you have the grid showing on your reference in photoshop, press ctrl-print screen together. Then turn off the show/grid. Drop down file/new - be sure the size is set to the clipboard (should be by default) and then paste (ctrl-V) the clipboard to the new image and there's the grid for printing. Sorry I forgot to say how to do this ...
I finally got it! It was not easy at the beginning, but then I found the trick how to do it faster now. Thank you.