Commodore VIC-20 User Manual page 59

Now try some spaces to create a title bar...
Another way to highlight a word is to draw a graphic box
around it. The technique is like drawing. Be sure to type
exactly as shown. Lei's do it step by step.
Type the same
combination five
times.
The screen will show a straight line. The next line includes
your headline and a vertical line at each end to complete the
sides of your "box".
This can be a
longer title, but then
you need to make
the box longer
by adding
more to
lines 10 & 30.