It’s an old standard carpentry measuring trick, but the difference is that his block is laminated for easy sliding. More important, it’s exactly one inch thick. He clamps the block on the fence and ...

To position a ruler accurately, place the point that says 0 at the start of the line you are measuring. With the ruler placed carefully on the line, measure the centimetres first, then the ...

Changing the ruler’s 0 origin means changing the position where the starting point (0) for measurement on the ruler is. The default zero position of the ruler is usually at the left edge of the ...