I have another problem. I have three scenes, for example, lasting 5 seconds (1, 2, 3) and I want to do door-type transition between scenes 1 and 2, lasting two seconds and take same type of door-type transition between scenes 2 and 3, lasting 2 seconds. The effect is that the first transition is a door-type and the second is the standard crossfade.
In the storyboard mode of the program, you can see the icon for the transition between 1 and 2 which you state is the door-swing. If you click on that icon in the storyboard, you have an option to apply to all. This will allow you to have the same transition for all remaning scenes.
Otherwise, in storyboard, click on the icon for the transition between 2 and three and set it to the door swing.