Deleting Drawing InstancesKeyCreator \ Layout \ Overview \ Deleting-Drawing-Instances
Drawing instances, once placed in a layout, can be removed using the entity delete features available from the Edit Menu. To remove a single instance from an existing layout, the Delete Single Select feature, found in the Edit pull-down menu, can be used. This is the global delete feature. When deleting multiple instances, use the Edit>Delete Multiple Select. This feature would also be used if you needed to delete geometry in addition to an instance (or multiple instances). Note that any entities that are tagged to an instance are deleted when that instance is deleted.