I tried to copy illustrations showing my problem into my posting, but the pictures did not make it into the posting when viewed it on line. the following is a textual description.
My document is 120 pages in length with Times New Roman 10 font and all margins set as .75 inches. When I open the document the page displays with the proper margins. After about 20 seconds the right margin jumps in to 3 inches.
If I open a new word document and set the margins to .75 inches and copy a small portion of my original document after the right margin has jumped in to 3 inches to a new document set for .75 inch margins the margins in the new document margins display at .75 inches.
If I select all and copy the the entire original document showing the 3 inch right margin into the new document set to .75 inch margins the right margin will display with a 3 inch right margin.
I'll attach before and after pictures to illustrate my problem.
before change 1.JPG
after change 1.JPG