That is good but can you just click on it and specify a time. I want to right click on it and set the transition for 5 sec or 10 sec. I don't want to guess at it. What is the best method to do this.
You can double-click the transition which will select the entire transition. The number in the lower right hand corner of the timeline will be the length of the transition. You can then expand the selected area to the time you desire. After expanding the selected area, expand the transition to fill that area.