title: Pysimplegui text element variable and fixed text
body: <p>In Layout:</p>
  
  <pre><code>sg.Txt('', size=(12,1), font=('Helvetica', 15), key='Text1', justification='left', text_color='green'),
  </code></pre>
  
  <p>Example:</p>
  
  <pre><code>parm = 123
  window.Element('Text1').Update("%.2f" % parm)
  </code></pre>
  
  <p>I would like to understand how to add a fixed text before and after the variable 'parm' that is written in Text1.
  For example:
  Voltage: 123V</p>
  
  <p>Thank you</p>