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Insert Diameter Dimension

In one sentence: Measures the diameter of a circle, placing the dimension line through the centre with arrowheads at both ends and a ⌀ prefix.

Overview

Workbench: TechDraw
Menu: TechDraw → Dimensions → Insert Diameter Dimension

The ⌀ (diameter) symbol is added automatically to the prefix. The dimension line passes through the circle centre.

Step-by-step

  1. Click a full circle edge in a view.
  2. Choose TechDraw → Dimensions → Insert Diameter Dimension.
  3. Click to place the dimension text.

Common mistakes and pitfalls

Diameter symbol on radius dimensions

Insert Diameter Dimension adds the ⌀ prefix automatically. If you use Insert Length Dimension on a circle diameter instead, you will get a bare number — add the prefix manually via FormatSpec = "⌀%.2f".

Cramped display on small circles

If the circle is small, the full diameter line through the centre may be cramped. Set FlipArrowheads = true to move arrowheads outside the circle, or switch to a Radius Dimension.

See also