Okay. A whole dossier of settings for that might be good.
And idk, just from a personal standpoint, I prefer bottom print because it is common. In this case, having the center of the screen clear so that users can see more clearly what they are building without distractions is more important to me than the place I would likely look.
If you don't mind making images of transparent numbers and letters, I guess you could do that but keep it at the lower center, and just code in the images to show up instead of the numbers or letters. Although I think it would be a really cool effect, it would be pretty darn annoying to do.