What should be the position of the operator’s left thumb during safe crosscutting?

During safe crosscutting, the operator's left thumb should be positioned around the front handle of the chainsaw. This positioning provides better control and stability when operating the saw. Wrapping the thumb around the front handle allows the operator to maintain a firm grip and helps to stabilize their hold as they maneuver the saw through the material being cut.

This grip is essential for minimizing the risk of kickback, which can occur if the chainsaw's cutting bar unexpectedly catches on something. A secure hold on the front handle aids in controlling the saw's direction and ensures that the operator can respond quickly to any sudden changes while cutting.

Having the left thumb in the air away from the saw would increase the chances of losing control and not being able to respond effectively. When placed on the rear handle, the thumb would not provide the necessary support for the saw's maneuverability. Lastly, positioning it behind the saw body could lead to an awkward grip and reduce the operator's overall control during cutting operations. Therefore, having the left thumb around the front handle is the safest and most effective position for crosscutting.