TinyMCE
If you want to customize TinyMCE within Voyager, you can do so by adding a additional JS file to your config.
In this file you have to define a function like
function tinymce_init_callback(editor)
{
//...
}
If you need to manipulate TinyMCE before it was initialized, you can use
function tinymce_setup_callback(editor)
{
//...
}
Now you can control the TinyMCE instance(s) on the page. For all possible variables and functions, please refer to the TinyMCE documentation.