# Bug when "level tracing line" extends to the segmentation boundary?

**URL:** <https://discourse.slicer.org/t/bug-when-level-tracing-line-extends-to-the-segmentation-boundary/10462>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [February 27, 2020, 7:59pm UTC](https://discourse.slicer.org/t/bug-when-level-tracing-line-extends-to-the-segmentation-boundary/10462 "2020-02-27T19:59:46Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [February 27, 2020, 8:03pm UTC](https://discourse.slicer.org/t/bug-when-level-tracing-line-extends-to-the-segmentation-boundary/10462/2 "2020-02-27T20:03:19Z")

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Probably your segmentation extents are smaller than the currently selected master volume extents. You can adjust your segmentation by clicking the “specify geometry” button next to the master volume selector (see screenshots [here](https://discourse.slicer.org/t/smooth-object-volume-statistics/3596)).

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_[View the full topic](https://discourse.slicer.org/t/bug-when-level-tracing-line-extends-to-the-segmentation-boundary/10462)._