Version: 1.2.0 (using KDE 4.4.4) OS: Linux The subject reference codes are controlled by a pop-up menu. The menu is long and unwieldy. It would be much more comfortable as a tree, or as three pop-up menus corresponding to tiers. Reproducible: Always Steps to Reproduce: 1. Open the XMP Metadata Editor. 2. Select the Subject Information pane. 3. Try to figure out the code for Christmas. Actual Results: 3. Unless you remember that it is 12014001, or have another more user-friendly reference GUI, the task is lengthy and tedious. Expected Results: 3. One of: * A taxonomy tree view. * Three pop-up menus for Subject Matter and Detail. * Helper buttons "Next/Previous Subject" and "Next/Previous Matter". OS: Linux (x86_64) release 2.6.34-12-desktop Compiler: gcc