Keyboard shortcut to alter divider position in Split view

Hi,

I'm using Split view in El Capitan to develop webapps at the moment.

I have a (live edit/reload) browser running in the left split, and my IDE in the right split.

That part is great - I'm glad I upgraded to El Capitan. I've used Divvy in the past, but like the way Split View operates in full-screen mode to give me more room.

However, I often need to move the position of the divider to give one of the windows more room that the other temporarily.

Could we have a keyboard shortcut for that, maybe to shift the divider left or right at 5%/10% increments with both windows auto resizing?

My development workflow is based around keeping my hands on the keys, rather than switching between keys/trackpad.

I do that because it's faster, and reduces the risk of RSI.

Thanks