why does my excel change the print options of another user's file
 

I receive excel spreadsheets daily from my sales people. I must print out the
sheet I receive. Until yesterday I was able to automatically print the sheet
on one page. Now when I open my sales peoples' workbooks to print the sheet
it has lost the "fit to" value and prints at 100% and , therefore printing on
several sheets of paper. I went to another pc and opened the same workbook
and attempted to print the same sheet. It printed correctly on one sheet of
paper. What setting has changed in my machine?