The buttons have exactly the same functionality as those of the List Box value editting, except that there is no 'Default' for this type of control.
Delete - Delete the currently selected Entry.
Add to Top- Add the new entry to the top of the list.
Add to Bottom- Add the new entry to the bottom of the list.
Add Back - If an entry in the list is 'double clicked', it may be editted and then returned to its former position in the list with this button.
Clear- Clear all the elements from the list
Set Default- Set the currently selected entry to be the Default value
Sort List- Sort the list into descending alphabetic order.
Paste- If you have a long list of values which might previously have been built into an Excel spreadsheet (for example), you may cut from the spreadsheet and then 'Paste' into the control to save time and unnecessary data entry.
Up and Down arrows- Will move the curerntly selected entry up and down the list.
OK- Save the list.