I have a 12" square brochure that they also want to print at 6"
I thought it would be easy to find an option in general to change the output size to 50% but there is nothing. The only way I can think is a ps file then distil it, but I don't have distiller. I could also just send the 12" and tell them to output the film at 50%, but that would leave me a little nervous. Anyone know a solution, or is there a demo of distiller maybe...i'll check that now.
Still, thought Indesign would have some option, maybe one that I don't know about
You could probably take the larger PDF and when they go to print it, indicate the 6" paper size, and then force the PDF to shrink to fit. Otherwise, you're going to have to set up a whole new Indesign document.