This was a good question from the Windows Live Movie Maker support forum. An user was asking a question about how to apply timing to the duration of the transitions that Windows Live Movie Maker offers.
So how do you adjust the duration of the transitions?
In Windows Live Movie Maker, at the top, on the animations tab, you'll find the transition effects.
When you have selected the transition you'd like to use to move from one video clip to another; you can adjust the time of the transition. The transition you choose can have a maximum of 2 seconds and as short as a quarter [.25] second.
You can preview the transition timing by changing the duration and then placing the mouse over the desired effect.
Repeat where necessary…
I hope this helps...
Larry Henry Jr.