Try one of the following:
1. Change the Page Scaling option of your print dialog window by unchecking or replacing the "Fit page to paper" or "Fit to printable Area" or "shrink oversized pages to paper size" option with any different setting before clicking OK to print your music. Often that is the cause of the problem. You may also try different Page Scaling options (any printer may have more or different options in the print dialog window).
2. If you use a ink jet printer, try to clean the print heads (refer to your printer manual for the correct cleaning procedure). A dirty print head can give you bad printing quality.
If you still have problems, please contact us.