Step-by-step:
- To edit the banner slideshow log into your BigCommerce control panel and click on "Marketing > View Banners" and select the Home Page Slideshow banner.
- Click edit, then once in edit mode, look for the little "Toggle Fullscreen Mode" button on the right of the tool bar (it looks like a blue window)
- Once in fullscreen mode, select the banner you want to replace and press "Insert/Edit Image" button (It looks like a little tree next to the anchor)
- Upload you new image and then exit fullscreen mode and press save.
- You can add additional slides by pressing enter once and inserting another image below/between the other slides.