While using Rapid dimension sometimes diameter symbol appears sometime it doesn't.
Solution
If we pick the Line/Edge and Centerline we get cylindrical dimension [Image 1].
If we pick the Snap point and Centerline then we get a non-cylindrical dimension [Image 2].
Notes and References
9746667
9584903
Hardware/Software Configuration
Platform: na
OS: n/a
OS Version: n/a
Product: NX
Application: DRAFTING
Version: V1899
Function: DIMENSION
Ref: 002-8510732