An option is available if you are creating an instance parameter that is one of the following types:
Text
Area
Volume
Currency
Mass Density
URL
Material
<Family Type>
Select either:
Values are aligned per group type (default): If an element with this instance parameter is part of multiple groups, the parameter value will be the same for corresponding elements in all group instances. While in Edit Group mode, you can select the element and modify the parameter on the Properties palette. Changing the parameter value for the element in one group will change the value for the corresponding element in all other instances of the same group type.
Values can vary by group instance: If the element with this instance parameter is part of multiple groups, the parameter value can vary for corresponding elements in group instances. While in Edit Group mode, you can select the element and modify the parameter on the Properties palette. Changing the parameter value for the element in one group will not change the value for the corresponding element in other instances of the same group type.
Note: If you change an existing parameter from varies to aligned, an error message displays listing the elements with the parameter that will change. If you click "Align Parameter Values," then all group instances will update to have the same parameter value. The value applied is the value that was assigned to the element in the first group instance.
Under Group parameter under, select the heading under which the parameter should display on the Properties palette or in the Type Properties dialog.
Choose whether the parameter is stored by instance or type.
(Optional) Use the Filter list to filter categories by discipline.
Select the element categories to which you want to apply this parameter.