title: How to insert tab character when expandtab option is on in Vim
body: <p>When I'm in insert mode and I have the <a href="https://vimhelp.org/options.txt.html#%27expandtab%27" rel="noreferrer"><code>expandtab</code></a> option switched on, pressing <kbd>Tab ↹</kbd> results in inserting the configured number of spaces.</p>
  
  <p>But occasionally I want to insert an actual tab character.</p>
  
  <p>Do you know how to do this?</p>