Different dynamics in different staves

I am composing a sonata that is based on the major pentatonic scale.

First movement:

Exposition: F#

Development: C

Recapitulation: F#

Second movement:

Exposition: Bb

Development: F

Recapitulation: Bb

Third movement:

Rondo form in abacaba pattern like this:

G, F#, G, Bb, G, F#, G, C, G, F#, G, Bb, G, F#, G, F, G, F#, G, Bb, G, F#, G, C, G, F#, G, Bb, G, F#, G,

So anyway I am trying to get the right hand to be heard over the left. It defaults to mf on both staves and when I get the left hand to be quieter, even with a mf dynamic for the right hand, it defaults to being as quiet as the left hand.

So how can I get the right hand to be louder than the left hand?