Re: Printing the score for the son...
Make sure you have all the regions selected and then open the Score Editor. All parts should now appear in the Score Editor window.
There's a useful section in the manual on Printing the Score (p.864):
"Printing a Score
The last step is printing your score. The printed result always corresponds to what you see in the Score Editor window. (Page Score view must be turned on.)
To print the score
Choose File > Print (or use the corresponding key command, default assignment: Command-P).
The Print dialog opens. Choose printing options (including printing to PDF), and click the Print button.
Before printing, you may want to turn on Print view, which shows the page margins onscreen.
To turn on Print view
ChooseView>PageDisplayOptions>PrintView(onlyaccessiblewhenPageScoreview is active).
More information can be found in â€œPrinting the Score.â€
Hope this helps. Let me know if you need any further help.