I have found, on the right hand side, a bit that says ‘template’. That leads to a sequence of choices which create a template in the page. At first I have two columns.

This may work. I hope that I can find a means of viewing the page. First, I must update and then view. This seems to work. Now let’s get adventurous and add a picture in a third column. The fourth column is a gallery presented as a slideshow, which is different to the lower element which is the slideshow.