Hello,

1, You need make sure, your slider is ready (you can create new slider or import slider demo include in theme package) , In backend wp admin -> Slider Revolution -> Create new or Import Slider:

2, In backend Edit page, you need click on button plus to add revolution slider element:

3, Chooise Slider you want use and Click on button Add Selected Slider

4, Save Change for page

5, Check your result on front-end page

Thank you.