I have one I can't find in the help or the tips, and should be simple.
I have Generated Video that I want to fade in then out.
I did it on one, but can recreate it!
move your cursot to the upper left corner of the clip until it turns to a sort of pie shaped icon, then while holding the right mouse button down,slide to the right for a fade in, do the same on the opposite side for a fade out. after that you can left click on the fade to change its properties.
place your cursor towards the top edge of the event ( left for beginning, right for the ending ). When the tool tip says OPACITY, drag it to the left or the right, depending on which end you are and that will do it.