Hi Cookie,
You can find it under the Design > Banner Manger
the sliders are called Main Banner 1, Main Banner 2 and there is 3, 4 and 5 with the Demo set
If you didn't upload the demo info, you may be missing these (I can't remember) If they aren't there you can install the demo stuff, or go to the demo on Abantecart and take a look at the formatting.
I've attached a screen shot of Main Banner 5
Hope this helps
Lee