# Trying to learn more about Precision and snapping **URL:** \ **Category:** SketchUp\ **Created:** [February 26, 2020, 2:24pm UTC](https://forums.sketchup.com/t/trying-to-learn-more-about-precision-and-snapping/117541 "2020-02-26T14:24:01Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![Geo](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/geo/32/82_2.png) [@Geo](https://forums.sketchup.com/u/Geo)\ **Post date:** [February 26, 2020, 5:20pm UTC](https://forums.sketchup.com/t/trying-to-learn-more-about-precision-and-snapping/117541/8 "2020-02-26T17:20:22Z")
> [@wake-and-make](#): > > I have been having trouble understanding how precision and snapping works in SketchUp. See this topic… > [@Drawing accuracy](https://forums.sketchup.com/t/drawing-accuracy/74481/5): > > • 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](https://help.sketchup.com/en/sketchup/introducing-drawing-basics-and-concepts#find-lock) → locks to the X axis … red ← locks to… * * * * * * > [@wake-and-make](#): > > So, what should I do if I want to maintain very fine precision but enjoy the convenience of working in the increments that are common in wood working? The increments one considers ‘common in wood working’ depends upon where one works wood. Few professionals in the millwork industry find joy in working with fractional inch increments. AWI Standards have been expressed tolerances in decimal inches for years. > [@Drawing accuracy](https://forums.sketchup.com/t/drawing-accuracy/74481/14): > > A bit OT, yet relevant to the topic of accuracy in woodworking. The Architectural Woodwork Institute publishes standards for the millwork industry. They inspect, test and certify millwork companies capable of meeting AWI Quality Standards. Quality oriented millwork companies typically hold AWI certification(s), under which they produce millwork meeting one of three AWI standards; Premium, Custom, Economy. Fractional dimensions do appear in the text of AWI Standards. But the actual tolerance… --- _[View the full topic](https://forums.sketchup.com/t/trying-to-learn-more-about-precision-and-snapping/117541)._