Changing a Multi Select Display Height at Run-time

Hi All,

Is it possible to change the display height of a Multi-Select field at run-time.

Reason: We have a Multi-Select with a default display height of 40, this same multi-select is required on our Search screen.
Having a multi-Select that's 40 rows in height is not convenient on a search screen

I know most people will say reduce the default display height, our users would like to see the full list on the entry screen as it makes record entry easier.