My custom shortcut for Preview app doesn't work As you can see, I defined shortcut, restart system, but it is still not visible. Why?
Just to give this an answer for future Googlers…

This appears to have been a bug, fixed in El Capitan 10.11.1 &amp; Preview 8.1 (877)



Or, as mentioned in comments, the initial tests were mistaking three full-stops for an ellipsis
… instead of …