If the plane is a tail dragger I like to set the 2-blade prop close to 2&8 o'clock when compression is first encountered. This is for a magneto or electronic ignition. When the piston reaches top-dead-center the prop should be around 12&6 o'clock and if it has an electronic ignition the magnetic on the hub should be passing under the pick-up.
That way when you have a dead-stick you are not coming in with the prop stuck at 12&6 o'clock.
Don't have any pics handy but simply picture a clock face on the front of the engine and align the prop that way.