title: PyCharm: Adding carets above or below the current caret using keyboard is not working
body: <p>In PyCharm, as I have to edit multiple lines at once, I've been trying to add carets below the current caret using a keyboard. As per <a href="https://www.jetbrains.com/help/rider/Multicursor.html" rel="nofollow noreferrer">this page</a>:</p>
  <blockquote>
  <p>Press <kbd>Ctrl</kbd> twice, and then without releasing it, press up or down arrow keys.</p>
  </blockquote>
  <p>However, when I do that, the text just gets scrolled. The cursor/caret is not moving at all.</p>
  <p>The afore-mentioned page, also says:</p>
  <blockquote>
  <p>To add carets exactly above or below the current caret position using virtual spaces, press <kbd>Alt+Shift+Up</kbd> / <kbd>Alt+Shift+Down</kbd>.</p>
  </blockquote>
  <p>I even tried that but in this case, the cursor moves to somewhat random places in the file.</p>
  <p>Note that I can insert carets above or below the current caret using a mouse (<kbd>Alt+Shift</kbd> + <code>mouse-click</code> + <code>dragging the mouse</code>). However, I want to do that using the keyboard only... just like in VSCode, it's quite straightforward:</p>
  <ul>
  <li><p>to add Cursor Above: <kbd>Shift</kbd> + <kbd>Alt</kbd> + <kbd>UpArrow</kbd></p>
  </li>
  <li><p>to add Cursor Below: <kbd>Shift</kbd> + <kbd>Alt</kbd> + <kbd>DownArrow</kbd></p>
  </li>
  </ul>