On Google a lot of different dual listboxes are show. The basic idea is to have unselected items on the left and selected items on the right, with the possibility to move items from one list to the other.
My questions:
Hi Roy,
Dual listboxes can be seen as two entities that can be interacted with, either by using Tasks or Drag Drop. In my example of Drag drop between subjects, it kind of resembles the Dual listbox you are referring to.
One way of creating a dual listbox is by having a Container, or Subject and creating two references. One to the left listbox, one to the right listbox. It is not mandatory to have reference columns but every case is different and might need reference columns.
The screen type of the Container subject will only contain two detail tabs, each with a different Detail group. The Container subject details should be set accordingly. Now you have two details side by side. Then the only thing left is creating the functionality to interact with these screens, either by Tasks (+ Process flows) and/or Drag drop.
Data model like in the example:
But it could also make use of a container, putting Shop order line and Product side by side
Edit: The Taskboard inside the SF might be of interest to you 
Taskboard · Thinkwise Docs (thinkwisesoftware.com)
(Please list Questions in the Questions & Conversations subforum. This is the ThinkStore subforum where our users can share their created solutions and functionality. Thank you in advance. I have moved the topic for you to the appropriate subforum)
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.