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There is no option to set the number of decimal places for an angular
dimension.
Solution
Select the dimension --> MB3 --> Settings --> expand Text --> Highlight Units --> set Nominal Display
dropdown to 45.5 in the Angular Dimensions section. Set number of decimal places
in the Decimal Places dropdown in the Units section.
Notes and References
Hardware/Software Configuration
Platform: na
OS: n/a
OS Version: n/a
Product: NX
Application: DRAFTING
Version: V1876
Function: DIMENSION
Ref: 001-6903710