[phenixbb] Phenix refine selection within distance

Hello All, I am trying select a subsection of my molecule only to run TLS refinement on. I want to select all residues within a certain distance from a given chain. I am using the selection editor within the Phenix interface and can't seem to figure out if Phenix provides this functionality in the view/pick selection editor. The Phenix.refine manual describes some "smart" selections, but they don't seem to work in the selection box. I have tried many variations of. within(5, chain 'H') To no avail. Is this possible to do in the selection editor? Thanks for your help. Andrew Waight