# Layout Model Editor Parameters

| Parameter | Description
--- | --- | ---
| Enable | Specifies whether or not the model should be active.
View Filter | Specifies a filter to determine which views the model will be applied to. When used, the model will be selectively enabled for views that satisfy the filter.
Region Box | Displays the list of regions within the model
Region
Units Mode | Specifies the dimensions of the selected region either as a percentage of the image/view, or in pixels.
Extent X | Specifies the width of the selected region, measured from the upper-left corner of the image/view.
Extent Y | Specifies the height of the selected region, measured from the upper-left corner of the image/view.
Feature Matching | Specifies which features should be assigned to the region. Multiple features can be selected.
Feature Count | Specifies the sum of the features that are valid for the region. For example, if you have two instances of DualTransistors and one IntegratedCircuit, you would set the Feature Count to 3.