How do I put overlays in my story?

Literally, my question is the title so…

how to upload:

You do that by doing: Bg with overlay.

@overlay NAME create
@overlay NAME opacity 1
@overlay NAME shifts to – in 0
@overlay NAME scales to – in 0

Or you could do…
INT. BACKGROUND with (overlay name)

Hoped that helped!

You can do
@overlayname create
@overlayname opacity 1
Or you can do this
Ext.background with overlayname

Make sure to put @overlayname opacity 1 if you are not including it with the background