You don't want to space icons out with little generic Windows executable icons after all, you want to space them out with nice transparent open space. We've created a 256x256 transparent icon for you.

How to make a background transparent in Photoshop using the Remove Background tool. 1. ... In the Layers palette, find the Background layer and click the eye icon to the left to hide it from view.

Although it won’t create an actual transparent image, it will remove the background for sure. Whether it is a solid color or an image in the background, you can use this method to get the job done.