Can I remove ads from a rotation?

Yes. Only ads that have yet to run can be removed. 

Can I change the number of ads in a rotation?

Yes, it will be applied to the NEXT rotation. It will not be applied immediately. 

Can I add more ads to a rotation? 

Yes, but make sure they are paused before added to the rotation. As it stands, the ads will be added to the rotation in whatever status they are in when added. Meaning, if active ads are added they will continue to run.

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