First navigate to the Search menu, and select Boolean from the various options:
In the Boolean search box, type the search operator CALL=
Then follow the equal sign with as much of the call number sequence you care to search, just be sure to end the string with the asterisk (*) wildcard character. The example below will search titles classed 595.752, and the asterisk (*) is necessary to retrieve all the variations of that call number: different authors, different publication years, etc.
The results will be sorted using the default Relevance feature, but you can adjust the sort to place titles in Call Number order.
You can use the asterisk (*) to truncate the Call Number search wherever you'd like; for example, a Boolean search for CALL=76* would retrieve everything between 760 and 769.999 classes.
Keep in mind that Call Number searching will not retrieve on-order titles since they have not yet been assigned a call number.
