This has happened a couple times so far--I open an already-created document
to work on it, and when I go to print it, the bottom 1/3 of the page won't
print. I go to page setup and it shows that somehow the margins were changed.
I try to fix them but the fix doesn't "take." That is, I get an error message
that I am trying to print outside the printable area.

This is happening with fairly important documents, like my grad school
thesis. I am afraid that if I email the document to my home computer (from
work) then whatever is happening with the formatting will carry over to my
home laptop.

Can someone help?