Currently USM alarm filter menus can not have more entries than fit into USM window and that depends on screen resolution and window sizes. Example from my world is that there can be only 34 entries in the menu, rest are then just truncated. Quite often there are needs to have more entries there, like: MSP wanting to have all origins there there in menu. This could be easily(?) fixed making that menu either scrollable or such that it extends to second (and more) column.