Use "Print Screen" on your keyboard (Com-Shift-3 for Mac) and paste your image in "Paint" or "Photoshop" or any other image editing application. Save as a jpeg file.
(Com-Shift-3 for Mac) makes a pdf that you can send or use apple-shift-4 and then select the screen part you want. It will make a .png file that you can send.
Use "Print Screen" on your keyboard (Com-Shift-3 for Mac) and paste your image in "Paint" or "Photoshop" or any other image editing application. Save as a jpeg file.
If you have issues pasting into your paint program, you can also paste into word and save the picture as part of a word doc, just an FYI.
For anyone planning on ordering VK7's i made this up, its easier( for me anyways) to get a better idea on what the sides and back will look like than the "customizer". Use it all ya want, I hear it wont work in Paint though, I dunno why.