If Outline Editor is configured to display aliases in the outline tree, the names from the active alias table are displayed.
By default, aliases from the alias table named Default are displayed. You can select a different alias table to be the active alias table for the current Outline Editor session.
Independent from this setting, you can set the active alias table for the Administration Console Session.
To set the active alias table for a database:
Open the outline in edit mode and select the Properties tab.
Under the Alias Tables node, right-click an alias table and select Set as active.
If the console Outline Tools option to display aliases is selected, Outline Editor displays in the outline tree next to each member the appropriate alias from the active alias table.
“Setting Aliases” in the Oracle Essbase Database Administrator's Guide
Setting Active Alias Tables for Administration Services Console Sessions
alter database (MaxL) in the Oracle Essbase Technical Reference
query database (MaxL) in the Oracle Essbase Technical Reference
setalias (ESSCMD) in the Oracle Essbase Technical Reference