# Blue Locate Tool – Creating a Layout Model

Once features have been labeled, a layout model can be created. There are two different methods to create a layout model:

- The right-click menu, Create Model option
- The Tool menu, Edit Models option

Note:

One limitation of the layout model interface is that a given region may specify which feature types are valid as well as the total number of features (Feature Count) that are required for the region to be valid. More complex types of validation expressions are not supported (for example, a single region that requires one instance of FeatureA, three instances of FeatureB and two instances of FeatureC).

To implement more complex validation expressions, you can "stack" regions by creating multiple regions with the same location and dimensions, but different validation criteria for each region. For example, Region1 would have FeatureA selected, and one instance of FeatureA; Region2 would have FeatureB selected, and three instances of FeatureB; and Region3 would have FeatureC selected, and two instances of FeatureC.

In order for the model to pass, all of the regions must pass.