title: Where do I define symbols tested with {$IFDEF}?
body: <p>When I use Delphi directives in code, like:</p>
  
  <pre><code>{$IFDEF something}
  .
  .
  .
  {$ENDIF}
  </code></pre>
  
  <p>Where do I assign the word 'something' in the project? I tried in some places in project options but it didn't work. Guess I didn't find the correct one.</p>