I'm writing 'cause I would like to know if there's an automatic way (like something to put in the preamble) to make the subscript behave as double subscript: for example if I write
something_a
it should behave as
something_{_a}
formattingsubscripts
I'm writing 'cause I would like to know if there's an automatic way (like something to put in the preamble) to make the subscript behave as double subscript: for example if I write
something_a
it should behave as
something_{_a}
Best Answer
You probably don't want to lose one-step subscripts, but to change their behaviour. If you want lower them, you can change TeX parameters as in the following example (the exact values are to be chosen):
If you also want to change the size of subscripts, you should be more precise: which TeX dialect (e.g., plain or LaTeX) are you interested in?