Window/Settings Preferences/Preferences...

In the Display options for Polygones you have to activate "Highlight Border Edges". With "Border Width" you can set how visible you need your border...

Thanks for your reply ....

but i have more the opposite problem. The circles are too big and covering the surface in some areas. I would like to reduce the size to have a point .. like vertices of...

Hi,

Does anybody know, if i can change the circle size of Sub Devision vertices.
It is sometimes hard to see the shape of the surface in areas were alot vertices are close together. I didn't find...