I had this same problem when I started. What you have to do is hold down the spacebar key then hold the left mouse key then press m on your keyboard then release the left mouse key then hold down the left mouse key again and drag
I had this same problem when I started. What you have to do is hold down the spacebar key then hold the left mouse key then press m on your keyboard then release the left mouse key then hold down the left mouse key again and drag