I’ve had several people email me, asking what program I use to do wireframes. The answer is Adobe inDesign. I find it’s really easy to create shapes and move them around with inDesign. It’s also easy to change the thickness of your lines, change the colors of the lines and the shapes, and to add arrow endings wherever you want. inDesign also has buttons that make it easy to line up objects and to distribute them evenly. It’s also the best program (in my opinion) for working with text, but that’s another subject for another day.