Steps:

• First go to your post type(either post,page,product)
• Then go to post metabox
• Click the Slider menu

• Turn on the Slider

• By default you will see 5 pre generated items
• You can delete all the items by pressing the delete button
• You can shuffle the items by dragging the items with the help of drag icon
• You can also duplicate an item by pressing the duplicate button
• Lastly, there is also an “Add new item” button where you can add a new item on your item list to show on slider

• You can customize your item by simply clicking on the item. It has similar options just like the “Settings” menu.

• After adding the item you can see those model on your right side of the screen where model gets loaded

• And save it