cinematic bars / film bars / letterbox effect
Create a good-looking letterbox effect in one click! (Also known as film bars or cinematic bars.) Add some atmosphere easily.

You don't have to adjust it by hand!!!!!!!!!! Just choose the action you want and use it instantly.

Update: new version makes it easier to adjust if you don't like the default settings.
Both versions are non-destructive (using the auto-action will not affect your illustration). I hope this is useful.
* I painted the image used as an example.
Old version