# I cannot open the markups to model section in the slicer 3d version.

**URL:** <https://discourse.slicer.org/t/i-cannot-open-the-markups-to-model-section-in-the-slicer-3d-version/30530>\
**Category:** Support\
**Created:** [July 11, 2023, 7:36pm UTC](https://discourse.slicer.org/t/i-cannot-open-the-markups-to-model-section-in-the-slicer-3d-version/30530 "2023-07-11T19:36:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Alirasat](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alirasat/32/82092_2.png) [@Alirasat](https://discourse.slicer.org/u/Alirasat)\
**Post date:** [July 11, 2023, 7:36pm UTC](https://discourse.slicer.org/t/i-cannot-open-the-markups-to-model-section-in-the-slicer-3d-version/30530/1 "2023-07-11T19:36:50Z")

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I want to measure sinus volume 3d but I cannot open the markups to model section. can you help me pls

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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 12, 2023, 3:50am UTC](https://discourse.slicer.org/t/i-cannot-open-the-markups-to-model-section-in-the-slicer-3d-version/30530/2 "2023-07-12T03:50:38Z")

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Have you installed the MarkupsToModel extension?