The View Mask is a list of depot paths in the form of:
//depot/sample1/...
//depot/sample2/...
//depot/sample4*/*.java
etc...
As long as the paths are in the client view, they will be used instead
of the entire client workspace spec when syncing and/or polling (see the checkboxes below).
Important Note: When polling, the changes will be pulled from the depot specs provided, reguardless of whether or not they are in the workspace spec. This means that if you specify a file or set of files that don't exist in the view, any changes made to them will trigger a build. It's also possible that builds will be triggered constantly. Use this option with caution.