Heck I dunno .. we just plot to scale and the text is scaled accordingly to the paper size. I know there is a general rule that the text should be the same size regardless of the size paper it is plotted on, but therin lies the rub. When I plot a drawing at 1/4"=1'-0" on Arch-E the text is one size, but if I plot that same drawing on Arch-C paper (at the appropriate scale), if the text remained the same, then there would be no room on the paper for the model as the text would completely take up the whole page, nevermind plotting Arch-B size.