I created a page and I set the template as showcase and then I went to setting->reading
and as a static page I choose my created page.
I’m wondering how I can add slideshows with pictures and sticky posts. I went to documentation in the link but unfortunately I couldn’t find anything.
Welcome … this forum is more suited for WordPress selfhosted not WordPress.com sites.
However … reading the WordPress.com theme documents it says
So please Add a new post and mark it as sticky and add an image. If you’re still stuck, try the WordPress.com forums.