Use the various dimensioning tools to measure 2D and 3D objects, and to add dimensioning lines and measurements to the drawing. Dimensions can be created on a design layer, or in the annotation space of a sheet layer viewport (see Creating Annotations for Sheet Layer Viewports ).
There are also Tape Measure and Protractor tools to measure distances and angles, and a Center Mark tool to mark the center of circles, ovals, and rectangles.
When you add a new dimension, the dimension standard set in the document preferences is used by default (see Dimension Preferences). In addition, when a dimension tool is active, the default dimension standard can be set from the Tool bar. Select any of the built-in dimension standards, or create a custom standard specifically for the drawing. If the default dimension standard for the document is changed, any new dimension that is added will use the new standard; no existing dimensions are affected.
~~~~~~~~~~~~~~~~~~~~~~~~~