Mouse right-click will enable edit options for any control. Pressing on 'delete' removes the control from the workbook.
'edit' option invokes control menu as show below. You can simply change any of options including the control type.
To move the control to another location, first bring the control to edit mode with mouse right-click. Move the mouse over the control until you see the move icon 
. Then you can grab the control with a mouse left-click. Keep left-click and move the control to its new location. Release the mouse left-click to fix the location.