Dozuki dovetail or tenon saw, kerf <.5mm thick.
This saw cuts when you pull the handle. Use only a little downward pressure when using it. The saw will cut with very little pressure.
Use the teeth near the handle to start a cut, to establish a groove for the saw to follow.
Tip the saw to cut the near and far sides of the desired cut. This will leave a high spot in the middle of the board.
To finish the cut and remove this high spot, cut down on both sides, the lift the handle and use the tip of the saw (that little flat part) to cut only through the high spot.
The "spine" (support along the top/back of the blade) will limit how deep a cut this saw can make
With blue canvas holder