Data Management Capabilities > Managing Part Structures > Windchill Options and Variants Capabilities > Developing Advanced Selection Logic for Configurable Modules > Basic Steps for Defining Advanced Selection > Adding a Parameter > User Interface Tab of the Edit Parameter Window > Enabling the Selection of Multiple Values for a Parameter
  
Enabling the Selection of Multiple Values for a Parameter
You can enable the ability to select multiple values for a parameter from a list of allowed values.
When you select multiple values for a parameter, the configuration process may produce multiple solutions, and you can use each solution to generate a different variant. If parameters are driven using constraints, multiple value selection for driving parameters is propagated to driven parameters.
To enable the selection of multiple values from a list of allowed parameter values:
1. Open a configurable module in the Part Structure Browser and click the Parameters tab.
2. Select a parameter for which you want to enable multiple value selection.
3. Click to open the Edit Parameter window.
4. Click the User Interface tab on the Edit Parameter window.
5. Set the value of the multiselect property to Yes and click Finish.