Is it possible to change the ShadowCalculation Method in OpenStudio?

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I'm trying to change the calculation method to DetailedTimestepIntegration. My hope is that I can do this somewhere in OpenStudio (though it doesn't seem to be accessible in the part of the interface that I would have expected). Alternatively, I can edit it directly in the IDF, but I'm not sure what other information I'd need to enter/if I would have to make any changes to the Calculation Frequency or Maximum Figures values.

ShadowCalculation,
  AverageOverDaysInFrequency,             !- Calculation Method
  20,                                     !- Calculation Frequency
  15000;                                  !- Maximum Figures in Shadow Overlap Calculations