I know this seems to be a joke but I’m looking for something that I can not find, because I do not know how it is called.
In fact it is using forms
we have a list in which we can save our choice to an other list.
And if we want we can remove this choice.
I don’t know how it is called and how to do that.
Are you trying to move elements from one list to another? That is what I understand from your request.
There are some questions on this site that tackle the same problem, like : Dual listbox – how to move items between two list-boxes?
Good luck!