I created masks to use over my focus fresnel so I can better compose with my A16 backs. Basically, I print them on transparency, using my inkjet printer. I created a variety of masks, including some for the digital back. Here is an image of the six versions one can print on an 8x10 sheet. Any suggestions to change or add would be greatly appreciated. Also, once I finalize the images, I will share the PDF here if anyone wants to use them.