In several dialogs, you can use the Filter list to filter categories by discipline.
Select one or more check boxes to indicate the disciplines for which you want to list categories. For example, select Structure to display categories that are specific to the structural discipline.
If you have opened a Revit project, or if the project includes links to Revit projects, you can select the check box for Display categories from Revit LT and Revit. Clear the check box to display only the categories that Revit LT supports.
The Filter list setting is common to several dialogs. If you set it in one dialog, the same setting applies to other dialogs that you open. Change the Filter list setting on each dialog as appropriate.
The Filter list displays on the following dialogs: