title: TODO markers disappeared in Visual Studio 2019 Enterprise
body: <p>I used to see markers on the left column(not sure about the name, it is the area where the debug breakpoints are marked with red dots) for the lines containing <em>// TODO</em>.</p>
  <p>Somehow this has disappeared. How can I get this feature back?</p>
  <p>Edit: I am referring to the green + on the left column.
  Here is a screenshot from my older computer that has VS2019 too:
  <a href="https://i.stack.imgur.com/tb1hS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tb1hS.png" alt="enter image description here" /></a></p>