symbols under letters

[ckoutsos]

Hello,
Is there any way I can put symbols _under_ letters instead of above them?
For example :
{vec a}
puts the vector arrow above the letter a.
Is there some way to put the arrow under the letter 'a'?

thanks

[ckoutsos]

Moreover,
can I somehow put a different symbol in the place of the vector arrow,
a symbol that is not listed in the available choices?

thanks

[RGB]

Use "csub":

[ckoutsos]

Yes, I know about csub but I was hoping for some other way.
The result with csub is very ugly because there's a large gap
between the letter and the symbol...

thanks anyway...