I want to use reveal.js in the WordPress theme of my website, which uses WordPress 4.2.2. I followed the instructions by alleyinteractive here.
- I downloaded reveal.js for WordPress.
- I extracted it into
public_html/wp-content/themes/revealjs-wp-theme-master. - I downloaded
Fieldmanagerplugin and extracted the zip file intopublic_html/wp-content/plugins/wordpress-fieldmanager-1.0.0-beta.2. - I can see the theme in
wp-adminas shown below:

However, I am afraid to activate the theme as I may lose the content of my website. Could someone tell me how I can create reveal.js presentation along with my current WordPress theme? What happens if I activate reveal.js theme? I learned how to make a presentation by reveal.js on my local computer but I don't know how I can have it on my website.