To make dimensions and members more easily recognizable, administrators can assign alternate, descriptive names called aliases, to Account, Entity, Currency, Scenario, Period, Version, Year, and user-defined dimensions and members. If they do, you can select which set of aliases to use for displaying dimension and member names. For example, one alias table could display members in French, and another could display members in German.
You can apply the following member and alias display options in various locations. See Where you can Define Alias and Member Display Settings.
Default—Display the data determined by the form, grid, or dimension settings
Member name—Just member names
Alias—Just member aliases, if defined
Member name : Alias—Names followed by aliases, if defined
Alias : Member name—Alias, if defined, followed by the names