

They are separate concepts. Project Units guide dimensions and temporary dimensions among many other values.Originally Posted by Goodanswer
Snap Settings for length and angle manifest in the process of sketching/moving/copying etc. They also are affected by our current zoom factor.
Sketch a wall using stock snap settings - zoom out you'll find snap settings produce larger increments for length in the dimension value that appears as you move your cursor away from the starting pick point. Zoom in/closer and the dimension values provide smaller increments.
The stock settings show 4' increments (1200mm) zoomed out and zoomed in quite close offers 1/4" increments. The idea is to provide a reasonable range of values that are useful for sketching based on how "close" we are to the task/work.
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