How to change the number of items rendered by Carousel web parts.

You can easily change the number of items you want to display in any Carousel web part (e.g. the Repeater with Carousel or the Attachments Carousel web part) by changing or adding the visible parameter to the Initialization script property as below:

$j(".carousel2d .jCarouselLite").jCarouselLite({
    btnNext: ".ppright",
    btnPrev: ".ppleft",
    visible: 7
});