• Tun Length Snapping off.
It is not an internal grid system extending from the Origin.
• Embrace decimal units.
Entering fractional inch units is cumbersome, inaccurate and slow.
Learn to employ SU’s guidance system of dynamic guides and snaps, Inferencing.
SketchUp’s Inference Engine uses the Arrow Keys to lock direction.
Inference Locking — SketchUp Help
https://help.sketchup.com/en/sketchup/introducing-drawing-basics-and-concepts#find-lock 1
→ locks to the X axis … red
← locks to the Y axis … green
↑ locks to the Z axis … blue
↓ locks to a plane and also locks parallel or, on 2nd click, perpendicular, to an edge … magenta
Shift locks to the current inference direction or plane … black or magenta
Accuracy — Aidan Chopra