Rules that determine what changes are acceptable

Selected Control Can be changed to
Check box Check box, combo box, list box, radio group.
Combo box Check box (if data item only has 2 values), combo box, list box, radio group.
List box Check box (if data item only has 2 values), combo box,list box, radio group.
Radio button group Check box (if data item only has 2 values), combo box, list box, radio group.
Grid column check box Grid column check box, grid column combo box.
Grid column combo box Grid column check box (if data item only has 2 values), grid column combo box.
Note:  In some circumstances you can not change a control type because a default value has not been set for the control.