After you select a parameter:
Enter the new value. The old one will be overwritten.
Edit the existing value directly in the Value cell.
Choose Edit from the popup menu on the Value cell and edit the value. Click Save.
Assigning the same value to multiple properties:
Because parameter sets are based on component properties, you may want to assign the same value to multiple properties.
Select the parameters whose values you want to assign.
Enter the new value and confirm to use the value for all selected lines.
Alternatively, click the Edit Selected values button or choose Edit selected from either the Edit or popup menu, edit, and confirm the value.
