Circle to Polygon Problem

Hello. Here is my problem in Catia V5
I draw a circle in a skecth with small dimensions. 4mm Radius. The circle is ok.
But when I go back to the main 3D part design, the circle has been converted into a polygon.
Is there any settings to change or anything else I could do?

2 Answers

it is visual illusion. change your performance options. you are using fixed. change it to proportional and value min (0.01).