Easiest way to adjust the clutch with a scattershield

I have about 1” of free play before the clutch starts to disengage, its just hard to tell when your driving because its different when your sitting with the engine off. I tried it the other night and was able to roll the car back and forth while depressing the clutch, i have about 1” of pedal free play and then about another 1/2” of pedal travel the clutch disengages.