Slide Numbers

You can display the page number of the current slide by setting the slideNumber config option to true.

Reveal.initialize({ slideNumber: true });

Format

The slide number format can be customized by setting slideNumber to one of the following values.

Reveal.initialize({ slideNumber: 'c/t' });

If none of the existing formats are to your liking, you can provide a custom slide number generator.

Reveal.initialize({ slideNumber: slide => {
    // Ignore numbering of vertical slides
    return [ Reveal.getIndices( slide ).h ];
}});

Context

When slide numbers are enabled, they will be included in all contexts by default. If you only want to show slide numbers in a specific context you can set showSlideNumber to one of the following:

Reveal.initialize({ showSlideNumber: 'print' });