I'm quite new to creating a database. On my navigation form, I have a dropdown list/combo box that contains up to 16 possible selections. The user should be able to select more than one item, but can't, when using the navigation form. In the man form that this 'writes to' the selections can be made, with checkboxes in front of each item in the list; but not in the navigations sub-form. the Navigation sub-form only shows the list in a column. I don't see any properties that explicitly allow more than one suggestion or restrict to only one, so am I using the correct control? If so, what am I not doing?