Make a dynamic slideshow of your snaps with Photo Story 3

Step 8 Next bit

Now we are looking at the second pic (Tony Blair in my example), and it's the same deal - you can move the start and finish frames around.

There are two new things to note though:

1) the box marked SET START POSITION TO BE THE SAME...

This allows you to tell the current pic to start in the exact part of the frame where the last one left off. This gets useful later!

and

2) the tab marked TRANSITION. Click on that.