# Segmentation editor not working

**URL:** <https://discourse.slicer.org/t/segmentation-editor-not-working/39654>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [October 11, 2024, 12:07pm UTC](https://discourse.slicer.org/t/segmentation-editor-not-working/39654 "2024-10-11T12:07:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Giovanni\_Nicoletto](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/giovanni_nicoletto/32/78202_2.png) [@Giovanni\_Nicoletto](https://discourse.slicer.org/u/Giovanni_Nicoletto)\
**Post date:** [October 11, 2024, 12:07pm UTC](https://discourse.slicer.org/t/segmentation-editor-not-working/39654/1 "2024-10-11T12:07:25Z")

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Hi everyone,  
I was trying to create a segmentation of a face from a full head file. The problem Is that when I try to edit my new segmentation, threshold, scissor and all the other tools don’t affect the head. I think I’m missing something before starting to edit but I can’t resolve the problem.

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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:** [October 11, 2024, 12:09pm UTC](https://discourse.slicer.org/t/segmentation-editor-not-working/39654/2 "2024-10-11T12:09:19Z")

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When you created the segmentation, you had another volume selected, which covered a different region. You can change the segmentation’s geometry as described [here](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#cannot-paint-outside-some-boundaries).