For subtlety in your powerpoint, use fade animation

One whole workshop at a PowerPoint conference I attended was devoted to "Animating Finesse."

And the one animation the presenters recommended above all others?

The Fade.

Especially to add subtlety and grace to all your shows.

Try fading in photo #1,then fading it out as photo #2 comes fading in on top of photo#1. Very smooth!

And this works equally well with text.