Applying the R.O.T using Photoshop

Ctrl + K

Click on Guides, Grids

Change 1 to 100

Change Inches to Percent

Change Subdivisions from 4 to 3

Change the Custom Color to RED

Click OKAY

Click on the Crop Icon (It looks like the letter L and a backwards letter L) Its the fifth icon from top to bottom on the left hand side of your tool menu. THIS IS FOR YOU TO BE ABLE TO APPLY THE R.O.T \

Lastly, using your snipping tool (on the window menu type in Sn....) you will screen shot the image after cropping the rule of thirds.