Add as many items as you need to the list and name them. Then simply paste the custom HTML code into the lower field to make add it to the selected slide.
Since any HTML code is allowed in this field this is an advanced feature and you should make sure your HTML code is correct.
It may conflict with other elements on the page after publishing if the code is incorrect.
Some small but very helpful features can be enabled or disabled in this section.
You can adjust the slider appearance to match the look and feel if your website design here.