I hope I not messed up (file builds locally into pdf)

I put "bottom layer" in quotes because it in fact configurable.

Text copied from cin-cv manual (I was looking under wrong section, overlay ( audio ) plugin, not overlay (video) plugin)

---------- Forwarded message ---------
От: Андрей Рандрианасулу <randrik@mail.ru>
Date: пт, 4 нояб. 2022 г., 18:56
Subject: cingg manual update on overlay plugin
To: randrianasulu <randrianasulu@gmail.com>


 
 
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Андрей  Рандрианасулу