Snaps to the wrong point

@Box, respectfully, I disagree. My experience has been that once a Vertex is created, the inference engine will find it and snap to it regardless of the “length snap” setting. Rather, that setting determines what lengths can be used for new Edges that you create using the cursor.

I think it more likely that @Yoona is falling victim to a variant of the small scale “Edge capture” effect that was recently discussed here:

I think that the end Vertices of the Edges that appear to meet at that corner are slightly off from each other (i.e. within SketchUp’s 0.001 inch tolerance). It’s also possible that there is hidden or other-context geometry very close to the corner but not visible. The inference engine flags one Vertex, but then the cleanup operation decides there is a end-intersection with one of the other Edges. When this happens, SketchUp “fixes” it by drawing the new edge to the end of the other Edge instead of to where the inference engine marker was located. That is, it concludes the other pre-existing Edge is right and it should adjust the new one instead of the other way around.

This happens only when working at very small scale, aka very high zoom, and only when there are very small errors or very small objects in the model. @Yoona, how large are the objects in your picture?

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