how do i create a form in django? what is the name of this type of form?

I just found the answer myself after “adjusting” the search parameters in Google. Before, none of the results matched my question, now I had tried a query “Django forms move several elements from left to right” just for fun. 😉 One of the possible solutions was this question here on stackoverflow: “Multiple left to right selection field“, which then also contained the answer to my question.

If someone else is looking for this type of form, the element is called “FilteredSelectMultiple-Widget with filter_horizontal on a ManyToManyField”.