With the Radial Dimension tool, you can create radius or diameter dimensions for circular shapes and objects in the 2D view of your drawing. In the example below, we'll measure a circular table.

To use this tool for either option, follow these steps:

1. Go to the Tools Extension tab and select the Radial dimension tool:
   
    

2. Move the cursor to the 2D drawing view. In the quick properties box in the top left corner of the view, the Associative checkbox is activated, and the object you snap the dimension to is highlighted in blue. Use the Dimension Type option to choose whether to create a Radius or Diameter dimension. The appropriate measurement is automatically calculated and displayed.

   Radius Dimension

   

    

   Diameter Dimension

   
    

3. Click once to attach the dimension.

   Radius Dimension
   

   Diameter Dimension

   

    

4. To place more dimensions, repeat step 3.
5. When you are finished, press the Esc key or move the cursor off the drawing area to release the tool

Editing a radius or diameter dimension

When a dimension is selected in the drawing, the yellow stretch nodes can be used to adjust the dimension or the placement of the text.

1. Click the yellow snap point and use it as a rotation point to change the placement of the dimension. Moving the cursor up or down along the dimension line will reposition the dimension text.
   
   The small, blue dot at the top of the dimension line indicates that the dimension is associative.
    

   Radius Dimension
   

   Diameter Dimension

   
    

Radius and Diameter dimension properties

For each dimension you can change its properties from the property box. Each dimension type has different sets of properties. To change them, select the dimension in 2D or 3D to bring up the quick properties box. 

• Text Style: Define the appearance of the text or customize by expanding Edit.
• Dimension Style: Define the appearance of your dimension or customize by expanding Edit.
• Line Style: Define the appearance of your line or customize by expanding Edit.
• Highlight text: Check this box to edit and make the text more visible. When checked choose highlight color.

General behavior of associative radius and diameter dimensions

If your radius or diameter dimension is an associative dimension, do note that:

• Clicking and moving the yellow stretch point along the dimension line will not actually re-associate the dimension. To do so, you must click and move the 'R' or the dimension text.