Command Only
:DISPlay:EYE:Y:SCALe:AUTO
This command executes Y axis auto scaling for eye diagram.
10 OUTPUT 717;":DISP:EYE:Y:SCAL:AUTO"
:DISPlay:EYE:Y:SCALe:PDIVision
:DISPlay:EYE:Y:SCALe:RLEVel
Eye/Mask > Scale/Mask > Auto Scale radio button