How to make an accessiblity bar?

1

In this WIki https://manutid.tiddlyhost.com/ you can see an accesibility bar, which helps to change fonts to ones that are easier to read like Atkinson Hyperlegible and OpenDyslexic

I was unable to locate the bar.
Is this a plugin or can someone turn this into a plugin?

2

I finally found it… this is the tiddler: Creación de materiales educativos con TiddlyWiki — Guía para la elaboración de material docente
HTTPHeadersGoES.json (16.6 KB)

It was hard to find because it does not look like wikitext.
It needs a reload and is solo en espanol so far.

Here is a link to the concept: Código | BatexeGo - Barra de accesibilidad para la web
It would be nice to have a translatable version in wikitext.

3

Too bad the button for reading produces compressed audio – so sped-up that it is garbled. The related resource you found (thanks!) has the font display modifications interface, but not the audio… At some point, I’m curious to poke around.