Page not aligned with margins, how can I move it?

Hi All,

My form has seen a lot of edits over the last few months, and at some point, the 'page' (JHA) moved outside the margins of the content area, and I can't figure out how to move it back. I'm using ES4, all software updates completed about a month ago. Here is a screenshot to show what I mean:

The 'page' is not centered, and is outside the content area/margin on the right edge (and inside it on the left). Why? and How can I fix it?

Thanks!!!!!