To Add Slider Images and Content Please follow below Steps.

Step 1: To Add Slider images and content, Inside left Side Bar Click on General Settings -> Homepage Settings -> Slider

Step 2: you can edit the existing slider images or you can add new one, to Edit Click on Edit button next to image in table or to Add new Click on Add New Slide Button in top header.

Step 3: Provide All Required Data like, Slide Title, Slide Description and Slide Image

Hit Submit to Save Slider and Apply it to website.