Many customizations are available. Resize images. Automatic or no movements. Add arrows or bullets or nothing. Use rich text editor to add text, with customized colors, sizes. Add links. Etc ...
You can upload images to the current page, or use avilable images. Just copy their urls
Choose to make images move automatically, and choose to show or not arrows and bottom bullets. Click Insert.
Enter parameters, for example, make clicking on the the slider image move to an internal confluence page or to an external page. Define image url, you uploaded before. Or use existing images in other pages.
Enter text, use rich text editor to define color, size, or make it a link. Add a table cell before to have a different background color and put text inside.
The second slider box macro has it's text changed. Click on it, and click edit to change the image to define a new one. Save changes.
Click on it, and click edit to change the image to define a new one. Save changes.