change brightness settings

im using kindle on my scroll however its sometimes very bright.
Is there a way to allow adjusting of brightness without having to go to the settings?
perhaps the sound volume which i do not use; map the sounds keys up and down to change the brightness instead of volume.?
Thanks
Paul
Is there a way to allow adjusting of brightness without having to go to the settings?
perhaps the sound volume which i do not use; map the sounds keys up and down to change the brightness instead of volume.?
Thanks
Paul