Different colors in the surface

[Zamiad]

Hello,
I am modeling a surface in stko, but I am noticing for the faces that has the same properties in one plane the color is different I mean some are more grey... like the attached picture.
Thanks,

[STKO Team]

In a surface the color is darker if you are looking at it from behind.
This means that those surfaces have normal vectors in opposite directions.

[Zamiad]

Thank you,
how can I change it to make the color all the same?

[STKO Team]

Use the Reverse command in the Geometry tab