how do make a box to write in that does change the spacing and prevents the template from being edited in word?

how do make a box to write in that does change the spacing and prevents
the template from being edited in word?

I'm using word 2010, I have figued out how to lock part of my document to
allow editing in certain areas but how do I lock the formating so the
spacing does not change as someone types into the allowed field?