Header Slideshow
Keep adding more subpages to your ‘header’ page, each with a featured image and text. Once you’re done, your frontpage will have a nice-looking header made up of the featured images of the sub-subpages, along with the text you added in the content field for each ‘slide’ as a text overlay.
The order of the slides in the slideshow will be decided by the publish date of the slide pages, with the slide page published the earliest appearing first, and the latest slide page appearing last.
Remember, the first subpage of the frontpage template is the only subpage that can be used as a header slideshow; all frontpage subpages after that will be flexible depending the content and whether they have featured images and subpages of their own, but they will not be able to create a slideshow.
Settings connected with the slider may be found in Template Options -> Frontpage tab.