# The color of the flipped segment

**URL:** <https://discourse.slicer.org/t/the-color-of-the-flipped-segment/3400>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [July 6, 2018, 12:12pm UTC](https://discourse.slicer.org/t/the-color-of-the-flipped-segment/3400 "2018-07-06T12:12:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![esurechao](https://avatars.discourse-cdn.com/v4/letter/e/c5a1d2/32.png) [@esurechao](https://discourse.slicer.org/u/esurechao)\
**Post date:** [July 6, 2018, 12:12pm UTC](https://discourse.slicer.org/t/the-color-of-the-flipped-segment/3400/1 "2018-07-06T12:12:37Z")

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Operating system: windows 10  
Slicer version: 4.9.0

I am trying to flip the segment of an organ in the 3D viewer.  
These are my steps:  
Load CT DICOM file.  
Use segment editor module to visualize the organ structure in the 3D viewer.  
Open transform module, and replace 1 with -1 in the element box (1,1) in the transform matrix.

The segment did flip, but the segment become black.  
Could I change the color of the flipped segment?  
Thank you very much!

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 6, 2018, 2:51pm UTC](https://discourse.slicer.org/t/the-color-of-the-flipped-segment/3400/2 "2018-07-06T14:51:56Z")

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If you export to a model you can use the [Surface Toolbox](https://www.slicer.org/wiki/Documentation/Nightly/Modules/SurfaceToolbox) module to flip the normals.

HTH

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 6, 2018, 2:58pm UTC](https://discourse.slicer.org/t/the-color-of-the-flipped-segment/3400/3 "2018-07-06T14:58:53Z")

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You may also choose to flip the master volume only. Segmentation does not have to be transformed.