By default, the AllowResizeSelection property is True. Use the AllowResizeSelection property to prevent resizing the entire selection when focused element is resized. Use the AllowMoveSelection property to prevent moving the entire selection when focused element is moved.  Use the AllowMoveDescendents  property to prevent moving all descendents ( children and outgoing elements ) when focused element is moved. The SingleSel property specifies whether the surface allows selecting one or multiple elements. The Selectable property of the Element object indicates whether the element is selectable or un-selectable. Use the AllowResizeObject property to specify whether the element can be resized at runtime.