# SegmentEditor - applying filter to non-visible segment, no feedback

**URL:** <https://discourse.slicer.org/t/segmenteditor-applying-filter-to-non-visible-segment-no-feedback/8153>\
**Category:** Development\
**Created:** [August 23, 2019, 10:59pm UTC](https://discourse.slicer.org/t/segmenteditor-applying-filter-to-non-visible-segment-no-feedback/8153 "2019-08-23T22:59:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![hherhold](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hherhold/32/12199_2.png) [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Post date:** [August 23, 2019, 10:59pm UTC](https://discourse.slicer.org/t/segmenteditor-applying-filter-to-non-visible-segment-no-feedback/8153/1 "2019-08-23T22:59:46Z")

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More than a few times, I’ve applied a filter (smoothing, etc) to a segment that I had accidentally selected but was not visible, and then thought that nothing had happened. What about a warning box saying that the filter to be applied is about to operate on a non-visible segment? (Happy to look into adding this if you think it would be useful.)

Thanks!

-Hollister

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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:** [August 24, 2019, 3:47am UTC](https://discourse.slicer.org/t/segmenteditor-applying-filter-to-non-visible-segment-no-feedback/8153/2 "2019-08-24T03:47:58Z")

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I agree, we could put a small warning icon (similar to the rotated slice warning) next to the “Apply” button that could help users to avoid this. The icon could have a tooltip that explains that selected segment is not visible and maybe it could be a button (clicking that would make the segment visible).

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**Author:** ![hherhold](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hherhold/32/12199_2.png) [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Post date:** [August 28, 2019, 1:48pm UTC](https://discourse.slicer.org/t/segmenteditor-applying-filter-to-non-visible-segment-no-feedback/8153/3 "2019-08-28T13:48:13Z")

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OK, I’ll look into this. I will most probably have questions…