In Invoice Section, when I print a Packing Slip there is no quantity listed on the packing slip. How can I modify it to show the quantity shown on the Invoice?

You can find the quantity on the right side of the document, @Texan22002. 
 

The packing slip includes the item, quantity, and other important shipping information, which will be displayed on the right side of the document. You can also zoom out the display by using the keyboard shortcut Ctrl + Minus (-) on Windows or Command + Minus (-) on Mac to ensure the quantity is visible.

See screenshot below:

If you still cannot see the quantity on the packing slip when printing, I recommend updating your Adobe Reader.
 

Please let us know if you need any further assistance.