title: How to make the text in a Tk label selectable?
body: <p>I'm creating labels in Tcl Tk, but their text is not selectable (for copy-paste). How do I make is selectable?</p>
  
  <p>I crate the labels using:</p>
  
  <pre><code>set n 0
  foreach t $list_of_labels {
      incrr n
      set lbl2 [label .prop_menu.main_frame.val_$n    -text $t]
      grid $lbl2 ...
  }
  </code></pre>