title: LaTeX: How to make a fullpage vertical rule on every page?
body: <p>I'm using LaTeX and I would like to have vertical rule along left side of page, topmargin to bottommargin, 0.5in from the left edge of the page.  I want this on every page, so I assume that means it must somehow be tied to the header or the footer?</p>
  
  <p>I've made no progress at all, so I need help with (1) making the full-length rule itself and (2) making it happen automatically on every page of the document.</p>
  
  <p>Can someone tell me how to do that?</p>