Sometimes, having an (XQuery) file open, I'd like to do some experimentation in the XQuery Builder view. You add a couple of lines of code, try it out, etc. Then, I'd like to comment out a line or a selection using Ctrl-Shift-, in this view, but this doesn't work. Apparently, the focus for this type of action remains with the previous file, and suddenly you get a comment where you cursor is in this file (or, if a selection was active, around it).

The behaviour is the same on Windows and Mac, latest 16.0, build 2014070913. These commands are listed under the "Document" menu item which is coherent with their behaviour (they apply to documents only, not to "buffers"), but I would argue that commands like this should be applicable in the window or view where the cursor is currently active, and this would be very useful there. Maybe that's not as easy as it sounds because of the Eclipse underpinnings?  Could you consider this for a future improvement?