Ahh, I though they had just dropped the tool from the list of options, not that it is no longer supported.
I have to admit that I rarely used a change in font size.
A sneaky round it is you want a smaller size you could try the Sup or Sub tags as that reduces the size, but places the text up or down on the line.
reduces the size, but places the text up or down on the line.
reduces the size, but places the text up or down on the line.
reduces the size, but places the text up or down on the line.