# Draw specific dimensions in markup module

**URL:** <https://discourse.slicer.org/t/draw-specific-dimensions-in-markup-module/18221>\
**Category:** Support\
**Created:** [June 18, 2021, 7:16pm UTC](https://discourse.slicer.org/t/draw-specific-dimensions-in-markup-module/18221 "2021-06-18T19:16:16Z")\
**Posts on this page:** 1\
**Page:** 3

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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:** [June 25, 2021, 5:59pm UTC](https://discourse.slicer.org/t/draw-specific-dimensions-in-markup-module/18221/41 "2021-06-25T17:59:08Z")

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This looks good. The missing region is due to how you specify the threshold range - you need to pay attention to cells that have points above and below the threshold value. Probably the simplest is to call threshold filter twice: first with `InvertOff()` then with `InvertOn()`.

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