Hey Joanne,
the Revolution slider is only insertable between the top menu section and the rest of the content, i.e. in your case above the “About” page. In order to display the slider, please visit the “Revolution slider” admin menu and add at least one slide to the slider you’re using. Another way (recommended) would be to import the demo slider included with the theme (look in the “Resources” folder of the main “Kanso_WP_theme_package” directory. Please let me know if I understood your inquiry correctly!
Sincerely,
Andrii / Satori Studio