Variability Modeling > Modeling variability in a model > What's new in variability modeling > Enabling and disabling variability modeling in a model
  
Enabling and disabling variability modeling in a model
Variability items can be created in a model only when variability modeling is enabled.
• When variability modeling is disabled for a model, you cannot use the variability modeling features to edit variability modeling diagrams or items in that model.
If you open a model for which variability modeling is disabled, Modeler does not take a Product Line Engineering license.
• When variability modeling is enabled for a model, you can use the variability modeling features to edit variability modeling diagrams and items in that model, assuming that a Product Line Engineering license is available.
If you open a model for which variability modeling is enabled Modeler takes a Product Line Engineering license.
When a model contains a Variant that model is a Product Line Model. You require a Product Line Engineering license to create and change variability items in a Product Line Model. In addition, you require a Product Line Model Access license to open a Product Line Model.
You can perform the following tasks only when variability modeling is enabled and you have a Product Line Engineering license:
• Create Variant Diagrams, Variation Points, Variants, Decision Sets and variability relationships.
• Create Product Models.
• Use the Variability toolbar.
• Use the Decision Set Editor.
To enable variability modeling in a model:
1. On the Tools menu, click Options.
2. In the left pane, click the Variability entry.
3. To enable Variability modeling, select the Enable Variability Modeling check box.
4. Click OK.
To disable variability modeling in a model:
1. On the Tools menu, click Options.
2. In the left pane, click the Variability entry.
3. To disable Variability modeling, clear the Enable Variability Modeling check box.
4. Click OK.