A transition is the animation between two slides. Your default should be none, or a fade so fast that nobody perceives it. Push, wipe, cube, ripple, honeycomb and the rest add running time to a deck in exchange for nothing, and a deck that transitions differently on every slide reads as a deck assembled by several people.
How does Morph work, and when is it worth it?
Morph is the exception, and it's a real one. It works by matching objects between two consecutive slides and animating the difference in their position, size, rotation and fill. When two slides show the same objects in two states, Morph shows the change as movement, and movement is how a person perceives change most cheaply. Three cases earn it. A repositioning, where the same set of items appears in different places on a matrix in two periods. A zoom, where a detail on a dense exhibit is brought forward and the reader keeps their bearings because they saw where it came from. A build-and-collapse, where a full framework reduces to the one branch under discussion.
The cost is bookkeeping. Morph matches on object identity, and the reliable way to make the match explicit is to name the objects in the selection pane. That's why naming objects in the selection pane matters. For a five-object diagram across five slides, four transitions at five objects each is 20 matches to keep straight. Any object that fails to match will fade instead of moving. To the audience that looks like a bug, and it is one.
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When is Morph the wrong choice?
The arithmetic for the five-step process compared makes the trade visible. Morph needs 5 slides where a build needs 1, and it costs 4 transitions at 0.75 s, which is 3.0 s of running time, or 2.56% of the 117.23 s of narration. That's a trivial cost in time. So why reject Morph for that content? Because nothing in a five-step process moves, and the movement would be decoration wearing the costume of meaning.
Verify (as of October 2026): Morph can be created in PowerPoint 2019 and later and in Microsoft 365, while PowerPoint 2016 can play a Morph transition but not create one, with behaviour that has changed across releases, and equivalents exist in other tools under other names. Confirm availability in the specific build your audience will open the file in, because a deck that relies on Morph degrades to a cut on a build that does not support it.