title: How do you set the default font for Tk widgets
body: <p>I have a Tcl/Tk app that generates many forms and would like to be able to configure the default widget fonts from a central location without having to configure each widget with the <code>-font</code> switch.</p>
  
  <pre><code>#!&lt;path&gt;/wish
  button .hello -text "Hello, World!" -command { exit }
  pack .hello
  puts "--- i would like to set this thing: [.hello configure -font] --- "
  </code></pre>