Use PowerPoint Designer
If you're an Office 365 subscriber, PowerPoint Designer lets you create designer slides in two steps: just add an image, and then select a design.
Select Insert > Picture, browse for the picture you want, and select Insert.
The Design Ideas pane opens, and offers several design options.
Select the design option you like.
To add a special effect, to transition from one slide to another:
Select the slide you want to add a transition to.
On the Transitions tab, select the effect you want.
Select Effect Options to change how the transition happens: From Right, From Left, ...
To undo a transition, select None.
To animate text or objects on a slide:
Select the text or object you want to animate.
On the Animations tab, select Add Animation, and select the animation you want from the drop-down.
To animate one line of text at a time, select one line of text, select an animation, select the next line of text, select an animation, ...
For Start, select When Clicked, With Previous, or After Previous.
You can also select the Duration or Delay.
To learn more, see Animate text or objects.