If the left frame contains a list of contents, and the right frame our text or pictures, it would be normal to have the contents list remain each time we clicked on a selection, but for the contents of the right frame to change depending on what we clicked on in the contents.
To do this we need to 'name' the right frame amd make our list of contents into a list of hyper-links.
This makes the coding a little more complicated like the next few lessons!
<HTML>
<HEAD> <TITLE>FRAMES lessons</TITLE> </HEAD>
<FRAMESET FRAMEBORDER=1 COLS="17%,83%">
<FRAME SRC="contents-frame.html">
<FRAME SRC="text-frame.html" NAME="text">
</FRAMESET>
</HTML>
Copy & paste the code in NOTEPAD, saving as new-main-frame.html