title: Insomnia REST Client - Set "Content-Type" for multipart/form-data
body: <p><strong>TL;DR</strong>
  How can I set the <code>Content-Type</code> headers for each <em>individual</em> file/input/text in a <code>multipart/form-data</code> request (in Insomnia)?</p>
  
  <p>I'm trying to POST to the OneNote API (<a href="https://blogs.msdn.microsoft.com/onenotedev/2017/07/07/onenote-ink-beta-apis/" rel="noreferrer">HTTP description</a>) using the Insomnia Rest Client. Per the documentation, I need to submit a <code>multipart/form-data</code> request with one file/text with headers:</p>
  
  <p><code>Content-Type: text/html
  Content-Disposition: form-data; name=presentation</code></p>
  
  <p>and another with the headers:</p>
  
  <p><code>Content-Type: application/inkml+xml
  Content-Disposition: form-data; name=presentation-onenote-inkml</code></p>
  
  <p>Here is a screenshot of what I am trying:
  <a href="https://i.stack.imgur.com/YYY44.png" rel="noreferrer"><img src="https://i.stack.imgur.com/YYY44.png" alt="headers"></a>
  As you can see, the API returns an error with <code>No Content-Type</code> leading me to believe that the <code>Content-Type</code> header is not set. The debug information is below:
  <a href="https://i.stack.imgur.com/E6T1k.png" rel="noreferrer"><img src="https://i.stack.imgur.com/E6T1k.png" alt="debug"></a>
  The POST data is hidden, which does not allow me to see the <code>Content-Type</code>.</p>