title: Insert external pictures in tikz, but cannot find the picture
body: <p>I try to insert an external picture into tikz editor, and the code is:</p>
  
  <pre><code> \node at (0,0) {\includegraphics[width=\textwidth]{IC.png}};
  </code></pre>
  
  <p>However, it is reported that the picture cannot be found. I was wondering how to specify the path of this picture. (I try to put the tikz file and the picture in the same directory but it does not work)</p>