About User-Defined Custom Dimensions

You can add up to 13 user-defined custom dimensions. For example, you could add a dimension called Project to budget operating expenses for each project. You define properties, including name, alias, plan type, security, attributes, and attribute values.

Caution!

You cannot delete custom dimensions after you create them.

User-defined custom dimensions differ from the Entity and Account dimensions in that you assign valid plan types at the dimension level, not at the member level. All members of a user-defined custom dimension are valid for plan types assigned at the dimension level.