One of the most enduring transitions from the classic film age is that of the cross fade. This fade is when one clip fades directly into another without going to black. The cross fade often connotes a certain amount of time has passed although the topical focus may be the same. This transition is usually one of the standard transition options in non-linear video editing software, but Windows Movie Maker does not include it on the menu. Instead you have to approach it completely different, but it gives you a little more control on how you want it to end up appearing.