I have a listbox like below. Would it be possible to lock a single value 'ABC' by default. When I want to select '1' it should show both 'ABC' and '1'. Similarly when I select '2' it should show 'ABC' and '2'.
I tried to lock 'ABC' by selecting option 'Always one selected value' but didn't work. After locking 'ABC' when i select'1' it showing '1' only. But I wanto see both 'ABC' and '1' in the list box.