Wednesday’s menu: New grid and some helpful eye-candy.
The measurement cues include display of dimensions of currently selected geometry. You no longer have to calculate the extents in your mind from the readings in the position bar. We do it automatically for you and show it in proper context.
Another visual aid that we’ve added comes into play when you move a geometry. A geometry can at any time move only in a single plane (the one that you are currently looking into). Sometimes it’s not obvious though. Therefore we have added motion lines which show the displacement of the geometry from its original position as you are moving it. This clarifies exactly which plane the geometry is moving in and by how much.
And what do you think about the new grid?
3DTin 
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what do these numbers refer to? are they cm?
Hi Mat, You may find more information in this detailed answer https://groups.google.com/d/msg/3dtin/eWBETu0tp7M/KU5xZtenYqgJ HTH.