Take the 2-minute tour ×  Would it be possible to make
subscripts in math mode automatically choose a smaller font when
a subscript is in uppercase?  E.g., if I have sA, the "A" would
appear quite big. Is it possible to tell the subscript operator
_ to use a smaller font when it sees an uppercase letter?  A
workaround is to define, say,
\newcommand{\l}[1]{\scalebox{0.x}{$#1$}}. But I would like to
see if what I desired can be made automatic?  share|improve this
question What about using lowercase small-caps letters? They are
meant for exactly the case that you need an uppercase letter
with the height of a lowercase letter. Scaling will look strange
next to lowercase subscripts as it decreases the stroke width of
the letters. A smaller font size might look a bit better than
scaling depending on the font but it's still not an elegant
solution. –  Christian Jun 1 '12 at 13:31
tex.stackexchange.com/questions/13040/… would then be a relevant
question. I don't find the solution there satisfactory though.
–  Christi