Does your theme rotate all these images?

Currently, it does not. This is something that I am planning to add in the future.

If I want to use them do I just save image?

Yeah. Click on the text link at the bottom right of the image that you like. This will take you to the full size of the image. Then just save it onto your local computer.

Then from your WP dashboard, go into Shiba Themes. Mouse over on one of the theme names and you should get a list of actions including ‘Images‘. Click on Images and you can upload your own images into the theme. You can create as many sets of theme images as you want and then assign them to posts, pages, tags, or categories.