A partition is a piece of a database that is shared with another database.
The title of the window that you use to work with partitions changes, depending upon whether you are creating or editing a partition and whether the source application is aggregate storage or block storage.
Each window contains a set of tabs, each of which you use to perform a partition-related task:
“Designing Partitioned Applications” in the Oracle Essbase Database Administrator's Guide
“Creating and Maintaining Partitions” in the Oracle Essbase Database Administrator's Guide
create partition (MaxL) in the Oracle Essbase Technical Reference
display partition (MaxL) in the Oracle Essbase Technical Reference