Hi @aaedla
Overall Look like below

Set the Screen OnVisible property to
ClearCollect(ColUnSelected,Items expected to list);
//Sample
//ClearCollect(ColUnSelected,Choices(IssueTracker.Priority));
Clear(ColSelected)
Insert a List Control (ListBox1) and Set the Items property to
ColUnSelected
Insert another List Control (ListBox2) and set Items property to
ColSelected
Set the On select property of the Arrow button to
Collect(ColSelected, ListBox1.Selected.Value);
Remove(ColUnSelected,ListBox1.Selected)
Thanks,
Stalin - Learn To Illuminate