title: How can I quickly add something to a few lines in vim?
body: <p>I'm trying to get away from my arrow use but there is one thing I've yet to solve without using the arrow keys. Take this example:</p>
  
  <pre><code>var1 = "1"
  var2 = "2"
  var3 = "3"
  var4 = "4"
  </code></pre>
  
  <p>Now I want this to be:</p>
  
  <pre><code>var_1 = "1"
  var_2 = "2"
  var_3 = "3"
  var_4 = "4"
  </code></pre>
  
  <p>Using arrows I would just goto the var1, insert and add the underscore and then arrow down and do the same thing. The problem with using hjkl is I can't be in insert mode so I have to esc out, move down, insert...rinse repeat which required more work. Is there another way to accomplish this?</p>