The "Search Lists" option allows the user to search the various list types (Variable, Observation, Project and Test) using either a single search pattern or a list of search patterns.
Upon selecting the "List Type" and entering in the search term, an auto-fill list will appear with all matched meta data fields:
Selecting the matched term and then selecting "OK" will again return matching lists in a tree structure, including a category structure for the lists.
Selecting the "Search a list of search patterns" option give the user the ability to use multiple search terms. Options include "Match all criteria" in the specified search terms, or "Match any criteria within fields".