title: Drop down option for a graph in dashboard of grafana
body: <p><img src="https://i.stack.imgur.com/FwUj9.png" alt="Grafana dashboard(screenshot)"></p>
  
  <p>Attached image shows the graph in dashboard which has two graph overlapped.
  I want to put a drop down option to it so that I can select one at a time.
   Sometimes I have more than 10 samples or graph in one so I would like to go with this approach or something similar option.</p>
  
  <p>I tried the default option we have at the bottom of the graph, but if I have n number of graphs in one that wont help me. I couldn't understand how to get this done. </p>
  
  <p>Can anyone help me with this.</p>