In order to show some, but not all of your assignments in your Chart printouts, one way is to hide the ones you do not want before printing.
With the Score tab selected, click on the first assignment number at the top of the screen and drag over to the last one you want hidden. They should be highlighted.
From the View menu, select Hide Selected
From the File menu, select Print
In the Report Options dialog box, change the Assignments: from Include All to Displayed Only.
Don’t forget to use the Preview Button to see if it is what you want.
To show all of them again, from the View menu, select Show All