This time I did look at Help.

I cannot change the font size, as I need to for a
sight-impaired friend I mail to.

I don't care about *my* screen though it would
be nice if it represented what is being sent.

The obvious font toolbar changes style but
does nothing with the size -- just ignores my
mouse.

I can use "Format Style: Heading 1" but that sets style
as well as size. Is this also in MSIE? (which I don't use?)

Mason C