# Beamer: Reserving space for video overlay

For preparing a video lecture, I would like to have a frame template on which I can reserve a rectangular area, on which I want to place later a camera overlay for screencasting.
Ideally, the template also has the aspect ratio 16:9, to allow for a FullHD recording.
The size of the rectangular area should be between around 1/9 of the total area.

|----------------------------------|
|              Title               |
|----------------------------------|
|                                  |
|                                  |
|        CONTENT      |------------|
|                     |   video    |
|                     |  overlay   |
|---------------------|------------|


A modification of the default scheme would be sufficient since the corporate scheme builds on it.

• IMHO you should draw with TikZ, for example, a rectangle of the correct dimensions in lower right corner. Then prepare all you slides taking care of don't write in the rectangle. In the end, for the final version, you just delete the rectangle from all you slides. Et voilà that's it. – vi pa Mar 23 at 20:08
• (And I apologize for assuming @vipa's gender in my bounty, but I can't edit it!) There should be a way to play with \setbeamertemplate{footline} in some way to get the content to flow around this overlay, but I can't find it… – Clément Aug 10 at 14:29
• @Clément No problem, by the way I'm a male. For your question I've found a the package shapepar of Donald Arseneau but I don't know if it work in Beamer class. – vi pa Aug 11 at 8:55

IMHO you should draw with TikZ, for example, a rectangle of the correct dimensions in lower right corner. Then prepare all your slides taking care of don't write in the rectangle. In the end, for the final version, you just delete the rectangle from all your slides. Et voilà that's it.

This is the very simple code:

\documentclass[11pt,aspectratio=169]{beamer}
\usetheme{default}
\usepackage{tikz}
\usetikzlibrary{calc}
\newcommand{\forCam}{
\tikz[remember picture,overlay]
\fill[red] (current page.south east) rectangle +(-5,3); %adjust this values by trial and errors for fit your camera overlay
}
\begin{document}
\node at ($(current page.south east)!0.5!($(current page.south east)+(-5,3)$)$) {Don't write here!};