To enable advertisements on each session there are two options which need to be selected on EACH computer.
\\Options\Site Options\Box Office\Advertisements
\\Options\Site Options\Printing\Advertisements
You need to create the new Advertisements in \\Maintenance\Advertisements.
Once created then you can programme sessions to have individual advertisements.
To View what advertisement is currently assigned to a session select [View Day]
To change an existing session
select View Day
select the advertisement on the left that you wish to display
<right-click> on the session, select Change Advertisement.
To add an advertisement when inserting a new selection
select any advertisement except for the cinema name (default = no advertisement)