I would love to add on 
Having the overlay drop down:
First place the overlay (move it to the top and place it offscreen at the top):
&overlay NAME create
&overlay NAME scales to % %
&overlay NAME shifts to X Y in zone #
&overlay NAME moves to layer #
&overlay NAME opacity # in S
*replace the % , X, Y, #, # , #, S with numbers
What they stand for.
NAME = name of overlay
% = size of overlay
X = overlay moving from left to right or right to left (horizontal axis, higher numbers right, lower numbers left)
Y = overlay moving up or down (vertical axis, higher numbers up, lower numbers down)
#= a number
S = the time, in seconds, can be 0, not negative
And then having the overlay come down:
@overlay NAME shifts to X Y2 in S
Place the overlay on the screen and the 2nd number you get for the shift, place it in Y2 since as mentioned previously the Y is up, down
You can even add an effect, like a bouncing one for having the overlay come in.
Check out: HOW TO: Use Easing Functions :disco:
To have the overlay appear in the scene, you’d need to use the opacity command. So when you create the overlay and add the opacity,
command for opacity: @overlay NAME opacity # in S
You can have the overlay appear right away by making S = 0 or make it slowly come into the scene by using a higher number.
The # in opacity is how visible it is. 0 means you can’t see it, 0.5, it’s see through, 1, you can see it fully.
Opacity can be written like this (0-1) or in percent (0%-100%)
You can read more on overlays here:
Hope I didn’t make it too confusing 
