Thank you for your post.
Whatever is displayed in Preview mode is also sent to the printer. Therefore, you can go directly to Print at this point, but be sure to select the option to print "Records being browsed". If you instead select "Current Record", then only one record will be printed.
In "Pre FMP 10" files, it's often handy to write a script that selects the report layout, finds the desired records, sorts them, enters preview mode and then pauses to show the sub-summary parts.
While the script is paused, the user can pull down the file menu, select/configure a printer and print the report. The only draw back is you have to train your users to choose records being browsed in order to get the right output. The script can also be set to return the user to whatever layout/records they had on the screen prior to starting the "Preview" script. That way, continuing the script takes them back to their starting point.
In FMP 10, Sub-summary parts are visible in browse mode which is very nice.
Thanks for your quick reply, it works.