Well, you can directly go to this theme documentation page and follow the instructions:
Go to Admin’s Panel Appearance -> Customize Section.
- From Customize section, go to Home/Front Featureb) d Slider.
- From Home/Front Featured Slider, you will be able to select various options. In the intitial, you have to check Enable Slider On from Slider Enable Options section.
I hope, this would resolve your queries.