This plugin sets your vertical 0 index as your main deck. Whenever you change your slide horizontally your vertical index will be set to zero.
There is no need for configuration.
Download zero-index-main.js
into the plugin folder of your reveal.js presentation ((i.e. plugin/zero-index-main
).
Add the plugin to the dependencies in your presentation, as below.
Reveal.initialize({
// ...
dependencies: [
// ...
{ src: 'plugin/altmode/altmode.js', async: true },
]
});