You cannot apply a transition to more than one element so that precise identification is critical. But while you cannot apply a transition to more than one element, you can apply multiple transitions to one element. This ability to combine effects can create interesting compound effects. As mentioned earlier, transitions are attached to individual elements. We identified an image with that name earlier so this is the transition that goes with that image.
Transitions have types and sometimes they have subtypes.
A type might describe the effect while a subtype might describe which direction that effect goes in. That doesn't give you a lot of choice but it does cut down on having to specify a subtype. As can be expected, the begin property specifies how far into the presentation the pushWipe begins. This could be an absolute time but it can also be referenced to another object. The duration is set for a simple 2 seconds.