Add transitions to all photos?

[KunPao]

I'm working on a slide show (240 pictures) of students work with their Camera. To make this looks nicer, is there a way to add transitions to every photo so i don't have to do one by one?

[Peru Bob]

Select all clips and then drag a transition to the timeline or select all clips and right click > add default transition.

[Jaap H · Accepted solution]

1. Set the transition you want as the Default Transition — By right-clicking the transition in the Effects Library and select "Set as Default Transition"
2. Command + Drag (Control+Drag for Windows) will select the edges of each clip. 
3. Finally, press CMD+D (Control + D for Windows) to apply the default transition to all the selected cuts.

You can also copy and paste a video transitions:

1. Copy any transition in your sequence — select it and press CMD+C (Control+C for Windows)
2. Command + Drag (Control+Drag for Windows) will select the edges of each clip. 
3. Finally, press CMD+V (Control + V for Windows) to apply the copied transition to all the selected cuts.

Watch this video to see it in action: https://youtu.be/Lr7JVT5EM1k