Online Documentation for SQL Manager for Oracle
Setting quotas
Use the Quotas tab of User Editor to view and set the quotas for existing tablespaces.
Select a tablespace in the list and specify the maximum amount of space that can be allocated in the tablespace, or select UNLIMITED from the drop-down list. For your convenience the built-in Byte calculator is implemented: click on the right arrow-down button to call the Byte calculator popup window.