frmArrangeOrUpdateViewing is an unbound form. Its format properties have been set to give it the appearance of a dialog box: scrollbars, navigation buttons and record selectors have been removed and the border style set to dialog.
An option group allows the user to select between arranging a new viewing and updating one with comments. The OK command button uses the option selected to determine whether to open frmViewingArrange or frmViewingUpdate. The Close command button simply closes the form.