Hydraulic symbol identification needed, please.

[F_Jacobsen]

Hi,
I'm looking to see if anyone here can explain to me how the valve in question is controlled. I've circled it in blue on the attached diagram.
It's part of a vehicle scissor lift. So far I've been unable to find any information about it. I have a theory that it may be controlled by whichever side of the valve has the highest pressure, but I would like that confirmed or dismissed. Any help is much appreciated. Thank you

 

[FluidPowerUser]

It's a manual control valve - rotary type

You turn the knob or lever to change which cylinder is operated.

 

[akkamaan]

Mobile Hydraulics

 

[Compositepro]

The valve also appears to have a variable restriction so I guess it is a single valve for speed and direction control of the cylinders.