The standard way i used to just grab and go with sheet goods, plywood, drywall, ect was to take my left arm at my side, palm facing out and hook my fingers underneath while holding the top with my right arm. And you are carrying the plywood at 3 ft height using arm, shoulder and neck muscles.
Since i had a torn rotator cuff and torn bicep tendon surgery which couldn't be repaired i can hardly pick things up with my left arm. So i have to try to do things "the easy way".
I had a tie down strap and was looking at it and said I took the long strap that wraps around the cylinder off which left the part that had the attached strap that was about 2 foot long with a hook on it and the rachet handle.
I hooked the hook under the material at mid point, lifted with the handle and held the top close with the opposite arm.
The length was just right to hold the sheet goods at "hang down" hand height so that all you were doing was using hand strength to hold the handle and not having to pick up the weight of the sheet goods. I carried it at about 6 inches off the ground.
You can go to Biglots and buy a set of these (the bigger ones) for like $15.00 the straps are about 1 1/2" wide and the handle is big enough to get all your fingers in.
I carried 5 sheets of 3/4 birch plywood to the shop quite easily and i wasn't having to use any arm strength.
So for all you old farts like me, do it the easy way...