In the Create Shared Parameter File dialog, enter a file name, and navigate to the desired location.
Click Save.
In the Groups box, click New.
Enter a name for the parameter group, and click OK.
From the Parameter group drop-down menu, select a group.
In the Parameters group box, click New.
In the Parameter Properties dialog, enter a name, discipline, and type for the parameter.
Type specifies the format of the information you can enter for the parameter value. You can select:
Text
Integer
Number
Length
Area
Volume
Angle
Slope
Currency
URL
Material. Allows you to select a material from the Materials dialog when you edit the parameter value in the Properties palette or Type Properties dialog.
Yes/No. A check box appears for the parameter value in the Properties palette or Type Properties dialog.
<Family Type>. If you select this option, the Select Category dialog opens where you can select the family type.
Note: You do not specify the parameter to be instance or type. You decide that later when you add the parameter to a family or a project.