To provide text etc. to fill the left-hand side of the screen we use the following code
<HTML>
<BODY>
<P>this text is produced by<BR> left-frame.html </P>
<P>You would typically use it for a list of contents. </P>
</BODY>
</HTML>
Cut & paste the code in NOTEPAD, saving as left-frame.html
For web pages used to provide contents for a frame, the <BODY> tag is used as normal, and, as usual, needs to be closed with the </BODY> tag.