Help with Divi

I went to look for the documentation for Divi, since that’s why I bought the plugin. But this support page is blank:
https://www.image-hover.oxilab.org/docs/integrate-with-page-builder/divi-builder/

In particular my sizing does not seem to work properly. My images are not square – I want their portrait dimensions to be reflected in a browser. However, they are being made square.

The page I need help with: [log in to see the link]