Hi Patrick,

This not PP option, this depending how you built your cabinet,

– If you have used Free Shape mode, the curves are converted into segments and you can’t define the number of segments.
And, if you import DXF goal is to convert curve in segment from CAD to manage smoothing prior import

– If you start with a straight shape and then add curves at an angle, you can manage the smoothing, but you have fewer options.
And, in this case IF you don’t have edge applied you get true arc on export  (for some PP only including SCM PP )

If you need more help please send draft of your cabinet to see best option

Hope that’s helpful