Jetzt ist es verständlicher - für dich wird's deswegen aber nicht einfacher... sorry.
Zitat:
DIST Command Measures the distance and angle between two points
 Inquiry toolbar: 
 Tools menu: Inquiry » Distance
 Command entry: dist (or 'dist for transparent use)
Specify first point: Specify a point 
Specify second point: Specify a point 
Distance = calculated distance, Angle in XY plane = angle, 
Angle from XY plane = angle 
Delta X = change in X, Delta Y = change in Y, Delta Z = change in Z
The true 3D distance between points is reported. The angle in the XY plane is relative to the current X axis. The angle from the XY plane is relative to the current XY plane. DIST assumes the current elevation for the first or second point if you omit the Z coordinate value.
The distance is displayed using the current units format.
Note When you work on a layout in paper space, distances are normally reported in paper space units. However, if you use the DIST command with object snaps on model space objects that are displayed within a single viewport, distances are reported in 2D model space units. When using the DIST command for 3D distances, it is recommended that you switch to model space.
Damit's noch lustiger wird - du kannst auch zwei Viewports haben - es ändert sich am Verhalten nix.