I have seen this in a few different incarnations but this sequence consistently reproduces it:
- Create a Style with the font Helvetica Nieu.
- Draw a circle.
- Create a radial dimension using the circle.
- Change “R<>” to “<> R”
- Modify the style to use Helvetica Nieu Condensed.
The dimension text then changes to “d”.
You have to play with the “<> R” text to get the dimension to appear again.