Try it Editor: html_frame

Edit This Code :



<!DOCTYPE html>
<html>

<frameset cols="50%,50%">
  <frame src="http://dwf-try.blogspot.com/2018/09/page-no-1.html">
  <frame src="http://dwf-try.blogspot.com/2018/09/page-no-2.html">
  <frame src=".htm">
</frameset>

</html>

Result :

html_frame_cols