How can include / exclude charges on an invoice?

Per default, all charges will be shown on an invoice. 

On the transactions screen, you can tick the boxes on the right and then select "print selected items" on the top. You can also click the "+" next to the Article and then select items to be printed via checking the box. You can do this for any House Account (HA), Reservation (RES) and Reservation ITEM (RESX).

This is particularly useful for business guests who request separate invoices for accommodation and bar charges.