title: How do I create/edit a YAML Release pipeline on Azure DevOps
body: <p>I have a build pipeline in YAML and it is working fine.  I now want to create the release pipeline.</p>
  
  <p>I have created the pipeline using the UI and I have added a task (which happens to be an AZURUE CLI Task), When U use the UI to add variables to the command I get the error.</p>
  
  <pre><code>#Your build pipeline references an undefined variable named ‘STORAGE_ACCOUNT_NAME’. Create or edit the build pipeline for this YAML file, define the variable on the Variables tab. See https://go.microsoft.com/fwlink/?linkid=865972
  #Your build pipeline references an undefined variable named ‘STORAGE_ACCOUNT_KEY’. Create or edit the build pipeline for this YAML file, define the variable on the Variables tab. See https://go.microsoft.com/fwlink/?linkid=865972
  </code></pre>
  
  <p>reading the documentation I need to add a </p>
  
  <pre><code>- variables:
  </code></pre>
  
  <p>section to the YAML, but I cannot find where to directly edit the release pipeline YAML.  (The build pipeline YAML is in my code)</p>
  
  <p>How do I edit that YAML Release Pipeline?</p>
  
  <p>Alternatively, how do I add variables to this release pipeline using the UI?</p>