A couple of new dimensions added to BikeCAD Pro version 9.15 include the saddle to drive side pedal dimension and the saddle to non-drive side pedal dimension.
If we animate this model we can see how these measurements will change as the cranks rotate.
If we pull up the drivetrain dialog box 
, we can move the cranks into any specific orientation we like.
By default, the reference point on the saddle is the lowest point on the top surface of the saddle. However, as with all measurements taken from the saddle, we can shift this point left or right and up and down using the saddle reference point dimensions in the Saddle dialog box 
.