title: How do I turn off mouse block selection in IntelliJ?
body: <p>For some reason, dragging the mouse cursor started doing block selects instead of the normal line select mode:</p>
  
  <p><img src="https://i.stack.imgur.com/70bmw.png" alt="enter image description here"></p>
  
  <p>(Please ignore the fact that this image is from Visual Studio and not IntelliJ)</p>
  
  <p>I tried pressing scroll-lock, pressing and releasing the alt/ctrl/shift keys, but still selecting doesn't revert to the normal "select full lines" mode. When I click and hold, then drag the mouse, I get a block (rectangle) selection.</p>
  
  <p>Do you know how to undo this?</p>
  
  <p>P.S. I'm running IntelliJ 9 on Ubuntu.</p>
  
  <p>P.S. Holding SHIFT and pressing the up arrow button also does block select instead of normal multiline select.</p>