Note: this feature is only enabled for models in the 1103 compatability mode. For models in 1200 or later you should use the native functionality in SSDT
Unlike Multidimensional projects, Tabular projects in SQL 2012 do not support display folders. This feature gap makes Tabular models less user-friendly since the field list in Excel PivotTables is longer and less organized than it could be.
Warning: While display folders work in Tabular models, they are not officially supported by Microsoft. If you encounter a bug in how Tabular handles display folders and open a support case, Microsoft may not provide support.
BI Developer Extensions provides a UI for editing display folders on measures, columns, and hierarchies. All display folders are edited in the same place. Right click on the .bim file and choose Tabular Display Folders…
That launches the UI for editing display folders:
Note that some changes like reordering levels or setting format strings will wipe out the display folders. BI Developer Extensions backs up the display folders in an annotation on the database. That way, the Tabular Pre-Build feature can prompt you to fix this setting.
After changing display folders, BI Developer Extensions may prompt you for the credentials to a data source which is using stored credentials if you have not already entered those credentials during this SSDT editing session. This prompt ensures that data source credentials in the workspace database do not get wiped out as display folder settings are applied.