If you want to put a slider with images:
Slider will start, if on the page will be code:
<ul class="news-carousel">
    <li><img src="link to the image "></li>
    <li><img src="link to the image "></li>
    ...
</ul>
It is necessary to put your images first.
Press the insert image button on the panel (), put the link to the image and press "ok".
Add your images in this way, after that - press "View" - "Source code" in the text edit panel. Find a place, where the images are. It looks in this way: <img src="link to the image"></li>
Enter <ul class="news-carousel"> in front of the first image, </ul> - after the last, and put every image between <li></li>.