The video below demonstrates ways to limit your search to find books in KlondikeSearch.
Most of HML's music scores are in the oversize book collection on west end of the third floor. There is a limited selection of study scores in the regular stacks, opposite the oversize stacks using the same call numbers. General books about Theatre Arts are in the 790s.
When searching for scores using KlondikeSearch, select "Scores."