Add detail to your diagrams by showing the size of shapes or the distance between two points.
Find and open the measure tools
Select More Shapes > Visio Extras > Drawing Tool Shapes.
Measure lengths and distances
Select the Measure tool shape you want and place it near the area you want to measure.
Place the endpoint of the Measure tool shape to a point you want to measure from.
Note: The endpoint turns green when the shape's ready to use.
Select the other endpoint and drag the Measure tool shape where you want to measure to.
Tip: Use the Horizontal measure shape or the Vertical measure shape if you want the measurements to align with the horizontal or vertical axes on the grid.