In introducing the FONT element, it becomes necessary to set the
base-level font size or characteristics for the entire document.
This is done via <BASEFONT>.
Thus <BASEFONT SIZE="3"> sets the base font for the document to 3.
Relative fonts, selected by <FONT>, are then
determined relative to this base size.
<BASEFONT> does not require a closing tag.
Recall that if you use <BASEFONT SIZE=7>, then
<FONT SIZE=+2> will not work, as 7 is the largest
possible font size.