Using the Realm Editor

Find the realm tab on the console top bar

https://help.aura-software.com/wp-content/uploads/sites/3/2020/09/realm-tab.png

and then click edit

https://help.aura-software.com/wp-content/uploads/sites/3/2020/09/realm-edit.png

Within the realm editor, select "edit custom fields"

https://help.aura-software.com/wp-content/uploads/sites/3/2020/09/realm-edit-custom-fields.png