You can change the scheduled flight dates and ad rotation for the ads attached to a placement. Each ad can be active during multiple flights.
In the main menu, click Campaigns.
Click the name of the campaign.
In the submenu, click Placements.
Next to the placement name, click … > Ad schedule.
Do any of the following:
To add a flight, click Add Flight, and then specify the start date and end date.
To add an existing flight to an ad, click + in the ad row for the flight column.
To remove an existing flight from an ad, click x in the ad row for the flight column.
(When multiple ads have the same flight) To rotate the ads unevenly, click Even Rotation in the flight information, and then enter the relative weight by which to rotate each ad, as a percentage.
The total weights must equal 100.
In the upper right, click Continue.
Review the flight details, and then click Save & Finish.