Italicize the signal

Error²Federal courts21st and 22nd editions

“See”, “see also”, “cf.”, “but see” and the rest are italicized where they introduce a citation; the same word doing the sentence's own verb work stays plain.¹

1. 1B2 Typeface for Court Documents; B1.2 Introductory Signals; R. 7(b) Foreign words and phrases.
2. 2An error: the rule in note 1 allows one form, and this is not it.