Is this a 'listbox' or a 'combobox'? A 'listbox' from the Controls
Toolbox only shows one item with an up/dn arrow. The combobox shows a
down arrow and displays 'n' items  which is configurable in the
properties of the combobox. There are also listbox  and combobbox on
the Forms controls too (they act differently).

The default to size of the list  to show  in a combobbox is 8 (as set
in its properties). If you selected it from the Controls toobox then
right-click and select Properties then change ListRows item from 8 to
whatever.