Used an editorial instruction

• Decided to keep
• Left in, to a proofreader
• Marked, as a manuscript
• Let stand, in editing
• Kept in a galley?
• Nullified a deletion

WordNet Word definitions in WordNet
v. printing: cancel, as of a correction or deletion printing: direct that a matter marked for omission or correction is to be retained (used in the imperative) [also: stetting , stetted ]

Wiktionary Word definitions in Wiktionary
vb. (en-past of: stet )

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Stet \Stet\, v. t. [imp. & p. p. Stetted ; p. pr. & vb. n. Stetting .] (Print.) To cause or direct to remain after having been marked for omission; to mark with the word stet, or with a series of dots below or beside the matter; as, the proof reader stetted ...