This is useful for an annotator who cannot find a particular sign because there is no gloss or keyword match to their initial enquiry (or at least one that is not expected and, hence, queried by the annotator).
an annotator is able to locate a sign with a similar form whose gloss or keyword is known or matches, and then manually search around that sign to see if the form they have seen in a text is recorded in the database despite there having been no initial gloss or keyword match (i.e., it may be entered under an unexpected gloss or keyword).