Boeing 757 Hydraulic Fluid Transfer
 

Good morning.
Anybody has any idea of how to transfer Hydraulic Fluid from one Rsvr to another one from the cockpit?I know there is a "procedure",or at least something Technicias can do,but I couldn t find it on the AMM and obviously it s not on any Pilots Book.I found it for Fuel,but not for Hyd Fluid,and that s the one I m looking for
Thanks in advance prune community :-)