title: How to change primary command in Edit
body: <p>I want to add some shortcuts in ISPF Edit.</p>
  
  <p>For instance, I'd like to type T for "TOP" and B for "BOT". How can I do this? I tried to enter</p>
  
  <pre><code>define t alias top
  </code></pre>
  
  <p>in the command line, but it didn't work: I have "COMMAND TOP NOT FOUND" if I use the shortcut.</p>
  
  <p>How can I achieve this? And how to have this shortcut available each time I open Edit?</p>