Link to the documentation

Hello
I would like to buy the theme but before that I wanted to explore the free version. The problem is I can’t find the documentation, can you send me the link and also I have a problem with the website I can’t get the place where to configure the slide images very well to have the same height and not leave much margin bottom. The slide is not good and has left a big space at the bottom.

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