2012

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.
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.
List of Prompts
The following prompts are displayed.
Specify first point: Specify a point
Specify second point or <Multiple points>: Specify a second point
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.
NOTE When using the DIST command for 3D distances, it is recommended that
you switch to model space.
Multiple Points If you specify multiple points, a running total of the distance
based on the existing line segments and the current rubberband line is
displayed in the tooltip. A dynamic dimension is also displayed. The distance
is updated as you move the cursor.
DIST | 403