Simply download the Zip file and decompress it.
From the Photoshop Actions palette (you can open the Actions palette from Window>Actions), click the Options Button (the button that is in the top right corner and looks like four thin lines stacked on top of each other). From there, select Load Actions.
The ctalyst Ad Sizes actions will now be available. Select the “All Landscape Sizes” and press the Play Button to create an empty, named canvas for each of the landscape image sizes.
Select the “All Portrait Sizes” and press the Play Button to create an empty, named canvas for each of the portrait images sizes.
These actions were designed to help make it easier to build and deliver the various ad sizes and to ensure each ad size is correct.
*Note: You will need Adobe’s Photoshop image editing program to use this action.