How to adjust the ear pieces
On the inside of each arm you'll see a slider with a round button at the end. Using something with a fine point (key, pen, etc.) push down on this button whilst simultaneously pulling the ear piece away from the lens. It will come away from the frame with a pop.
You can then slide it back it, stopping at any of the four adjustment points.
You can also swap the ear pieces for the included soft rubber hooked ear pieces - their adjustment and installation is exactly the same.
How to adjust the lens
Hold the Raptors side-on. With the lens in one hand, grip the frame with your other hand and gently angle it up or down. It can click into position in any one of the six adjustment teeth.
Removing the lens from the frame
Hold the nose piece of the Raptors in one hand, and the thick centre part of the frames in the other. Gently pull your hands apart, and the lens will separate from the frame. Repeat this process in both corners.