Creating an image gallery
First, click the "+" button to add a new section to the page.
Choose "Image Gallery" from the list of options.
A new image gallery will be placed on the page, displaying placeholder content until you add your own. Click the green "Upload Image(s)" button to upload your images.
Once your images are uploaded, click on the "Layout" tab. From there, you can choose different layout styles and customize how each is displayed.