Hi there,
First thing you need to create a new slider on Slider Revolution. You should set the Slider Type as “Hero Scene” And Slide Layout to Auto. – You can also try aother settings, it all depends of your design goals.
The width of the grid size will depend what you have set at your Dashboard/Wp-Admin/Appearebce/Customizer/Layout and Design.
Site Max Width (Please check pic1)
Once you create the slider and I reccomend you going trough some tutorials on youtube so you can learn about the functionalities, you have to go to the page you would like to add the slider and click Edit than scroll down until you find “Slider Above Masthead” Turn it on and select the slider you created.
Hope that helps!
Joao