How to set silent mode on android lollipop

• To turn on silent mode on a nexus 5 with lolipop:
  
  Press the sound up/down button once:
  
  
  Press priority and press the options/config/gear:
  
  
  Set it like this:
  
• All done. You are now in "Silent mode". To turn off silent mode just press the sound up/down:
  
  And press the "All" button.
  Now when you press the "priority", you will enter into "silent mode" and when you press "all" will be in normal mode. You do not need to lower the volume to silence your phone. In the "silent mode", you will still hear the alarm clock as usual.