The Search Path setting specifies the path used for finding the loaded experiment's associated source and object files for displaying annotated source data in the Source and Disassembly views. The search path is also used to locate the .jar files for the Java Runtime Environment on your system. The special directory name $expts refers to the set of current experiments, in the order in which they were loaded. Only the founder experiment is looked at when searching $expts, no descendant experiments are examined.
By default the search path is set to $expts and . (the current directory). You can add other paths to search by typing or browsing to the path and clicking Append. To edit paths in the list, select a path, edit it in the Paths field, and click Update. To change the search order, select a path in the list and click the Move Up/ Move Down buttons.
See How the Tools Find Source Code for more information about how the search path is used.