Hi,
How can I create or add pages which will appear under another page on the website?
To add sub-pages under another page, you can use “Album Grid” block from blocks section or open the page that you want to add sub-pages and click on the “Plus” icon and from block menu click “Album Grid”.
Once you click on it, “Album List” menu appears where you select the albums that will be added as sub-pages to your website.
Here is a help topic on how to work with “Album grid” on the website: https://help.slickpic.com/article/how-to-create-an-album-grid/