Configuration
Entity Management

Updated:

Admin users may add and edit selection options for certain multiple choice fields at Settings > Lookups (not all multiple choice fields are customizable - some have fixed selection options related to various system functions).

In order to add or edit selection options for a customizable multiple choice field, click on the Lookup tab that corresponds to the field where you would like to add or edit selection options.

You can edit any selection option by clicking on it or add new selection options by using the Add field at the top of the list.