Do you mean that the the list goes off of the screen? You can decrease displaycount to prevent the combo from going off the screen.

>I have a form with a combo box. I used the builder to specify it. it works fine when I do the data entry on the form, however, if I want to change the selection in the combo box, when I click the down arrow the dropdown portion of the combo box does not remain on the screen. As soon as I move the mouse, the dropdown disappaears.