# Compress dialog box

You use this dialog box to issue the DFSMSdss™ COMPRESS command to compress the data sets that you selected in the Tivoli® Enterprise Portal. To learn about the standard capabilities of a dialog box, see Standard tabs in the dialog boxes of the Storage Toolkit. The topic includes a link to the Reference guides for commands that are used in the Storage Toolkit.

The dialog box provides the following options:

- Run as DFSMSdss Administrator: Select this option to cause the command to run with Administrator authorization in DFSMSdss. The user ID that you are using must be authorized as a storage administrator in DFSMSdss.
- Dynamic Allocation: Select this option to cause the command to use dynamic allocation for the affected data sets.