I've not seen a standard position for such fields. Different software produces different layouts of printed information. I suppose it's possible that MOST softw

I've not seen a standard position for such fields. Different software produces different layouts of printed information. I suppose it's possible that MOST software will produce a standard layout, but in my short time in the industry I witnessed a wide range of layouts for documents intended to be folded and inserted into a window envelope. (EDIT: Should add that 'software' would also include printer drivers and printer hardware/software that does not always interpret fonts, sizing, etc., in the same way.) As for how folder-inserters can be used incorrectly: there are various settings you have to fine-tune, most notably the location of the creases. If the creases are too far in one direction, you will end up with the address not displaying appropriately in the window. So you run a test, bump it up or down, and repeat until the info is in the window correctly. THEN, and only then, do you proceed to run the remaining 100s or 1000s of pages. Worth noting that tuning is not always due to printed pages being in different layouts. The machines themselves have moving parts that start drifting a bit over time, so you are basically recalibrating it.