Version and Setup: Traktor Scratch Pro 188.8.131.52 macOS High Sierra 10.13.4 Reproduction Steps: Go to Preferences > Controller Manager and make sure you are using the English Traktor 2 or Traktor Scratch 2 default keyboard mapping Press Ctrl+. or Ctrl+/ to switch to the previous or next layout, as indicated in the Traktor 2 Keyboard Shortcuts PDF Observed Results: Nothing happens, because Layout Selector Dec and Layout Selector Inc are both mapped to Ctrl+/. Expected Results: Traktor should switch to the previous or next layout. For this to work, Layout Selector Dec needs to be mapped to Ctrl+. The German keyboard mappings don't have this issue.