After deploying the Engage Rotator, you will first want to set it up appropriately so when you start uploading slides they are imported using the correct dimensions.
Begin by hovering over the pencil icon and clicking 'Rotator Settings'.
Rotator Delay - Determines how many seconds each slide remains visible before switching to the next.
The rest of the settings on the first tab should stay the same. Then select the content tab. Here all you need to enter is the appropriate height and width you want the rotator to display at. This part is important because if the dimensions are too wide, it can overflow into the content next to it.
If you accidentally made it too large, you can always come back and adjust accordingly. Just keep in mind you will have to reupload your images afterward.