The author works around the room from left to right, with copes on the left ends and butt cuts on the right. The process starts with a temporary starter piece carefully positioned and tacked into place in the corner of the last wall.
The author fastens only the right half of that piece so that it can be flexed away from the wall when the last piece slips in.
This ensures that the coped end of the next piece fits snugly, with no need for fine- tuning the joint.
Then, he flexes the first piece away from the wall with his right hand while supporting the last piece in his left hand.