how do I use the certain buttons and other elements now? How can I add them to the page?
I only can add
article-list
article-list-latest
article-show
grid-example
image-carouseltheme-example
The component parts that come with the starter-bootstrap are just examples. You will need to make your own parts with a controller JavaScript file and html Thymeleaf file and put your own code in those. I suggest you take a look at the “My first app” tutorial http://xp.readthedocs.io/en/stable/tutorials/my-first-app/index.html