The Timeline makes it easier for you to animate your banners but did you know you can copy animation from one layer to another or from one slide to another within the same banner?
Copying Animation Effects
Here is how you can do that: just click on the colored bar assigned to the layer that contains the animation you want to copy then click on Advanced mode in the upper-right corner of the overlay that will open on your screen. Copy the animation by clicking on the Copy button then click on the colored bar assigned to your target layer, click on Advanced mode then Paste.
As you can see there are two options when pasting an animation in the timeline, Transition only and Transition with timing, in case you need to sync the timing along with the animation that you are applying.