How to add charges on atoms in avogadro?

cna any one help to add charges on structures in avogadro

You can add formal charges to atoms using the Atom Property table.

But I think a better question is what you want to accomplish by adding charges to atoms?

Actually, the structure i want to optimize is an orgnaic salt.
It has positive charge on nitrogen atom… So i need this charge to be added becuse if charge is not added it is considered as neutral… This creates a problem for me to optimize the structure