Use “id.” as the short form

Error²Federal courts, Illinois courts21st and 22nd editions

The short form for the immediately preceding authority is “Id.”, not “Ibid.”, which belongs to other citation systems.¹

1. 1R. 4.1 “Id.”; B4 Short Citation Forms.
2. 2An error: the rule in note 1 allows one form, and this is not it.