Measures the distance and angle between two points.
Summary
In general, the DIST command reports 3D distances in model space and 2D distances on a layout in paper space.
In model space, changes in X, Y, and Z component distances and angles are measured in 3D relative to the current UCS. The distance is displayed in the current units format.
DIST assumes the current elevation for the first or second point if you omit the Z coordinate value.
In paper space, distances are normally reported in 2D paper space units. However, when using object snaps on model space objects that are displayed in a single viewport, distances are reported as 2D model space distances projected onto a plane parallel to your screen.