Making Delta Measurements
To measure the distance between two arbitrary points by coordinate distance, you use delta measurement.
The following diagram illustrates both the direct distance from point A to point B, and also the delta for the world axes x, y and z.
Activities
Measuring a Delta Distance between Two Objects
Choose 
, and then click to select the first vertex. Place the cursor over your second vertex, and click it.
Both direct and delta measurements display in the scene.