Reply To: Create text frame from selected text in indesign

What do you mean by ‘paste into the text field again’? That the frame becomes an inline? If what you select is on a single line, then the script below would do it. Select some text, all on one line, and run the script.

(function(){
  var width = app.selection[0].endHorizontalOffset - app.selection[0].horizontalOffset;
  var frame = app.selection[0].textFrames.add();
  app.selection[0].move (LocationOptions.AFTER, frame.insertionPoints[0]);
  var gb = frame.geometricBounds;
  gb[3] = gb[1]+width
  frame.geometricBounds = gb;
}());

Peter