Guide Guide is a free extension that—in it’s own words—makes grids that don’t suck so hard. When installed, Guide Guide is accessed via a handy fly-out panel. Simply click on one of the top icons to find the middle or enter in the desired numbers for margins, rows, columns and even gutters.
At it’s simplest, Guide Guide a quick way to find the half-way point of your document which is handy for doing a card or Diptych.
For French Kiss Collections, I use Guide Guide to quickly create a grid to layout a graphic for brushes in a set. For the grid below, I simply entered in 4 in the row field and 4 in the column field and Guide Guide did the heavy lifting.
Those are simple examples, but as you can see, Guide Guide is easy, it’s free and it’s a Photoshop essential!
To quote the Guide Guide site: Honestly, if you haven’t started downloading it by now, you’re probably a masochist.