Hey, I've built an app, that draws text to four rectangles on a pre-printed page with a design, I'm wondering what the margin refers to?

I've not specified any margin...

Also our printer doesn't print all the way to the edge, there's a white border, about the height of this little guy: ,

If I printed from a printer that prints to the edge, will the text be in the same position as it would be if it was printed with the border around it, the text should be in the exact same position right?

Kind Regards
Me