# NxM Structuring Elements

The default structuring element has a dimension of 3x3, but you can also use the tool with a larger element using the Grey Morphology NxM operator of the One Image Edit Control.

Using NxM grey morphology still allows you to specify a kernel of custom values, similar to using a custom structuring element in a standard 3x3 element. By default this option is disabled and is not used by most vision applications that require grey-scale morphology, so you must explicitly enable this option through the One Image Edit Control or programmatically through the KernelEnabled property.