# Volume rendering synchronize with volumes

**URL:** <https://discourse.slicer.org/t/volume-rendering-synchronize-with-volumes/9366>\
**Category:** Support\
**Created:** [December 3, 2019, 1:35pm UTC](https://discourse.slicer.org/t/volume-rendering-synchronize-with-volumes/9366 "2019-12-03T13:35:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fbordignon](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/fbordignon/32/5269_2.png) [@fbordignon](https://discourse.slicer.org/u/fbordignon)\
**Post date:** [December 3, 2019, 1:35pm UTC](https://discourse.slicer.org/t/volume-rendering-synchronize-with-volumes/9366/1 "2019-12-03T13:35:46Z")

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Problem report for Slicer 4.11.0-2019-11-21 win-amd64.  
Hi, I would like to report a behavior that, if it is not a bug, it is really unhelpful and confusing.  
When I check the synchronize with volumes module at the advanced tab of the volumes rendering module, if the checkbox is not grayed, the synchronization does not work. i.e.  
 ![slicervolumerendering](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/f/9f662e38fcc407c7f94ba313871ff7eb51727a6f.png)

With this state, the box is with a white background, the synchronization does not work. If I uncheck and check again the checkbox (or click the label), the box is then grayed and the sync works.

![slicervolumerendering_gray](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/5/c57c57fd4dd123d9691a7ae7e99c7471f91e4c60.png)

I’ve clicked the label of the checkbox a number of times and seeing the checkbox checked, I figured it was supposed to sync with the volumes module, went over the volumes module and it was not.  
Can we send a signal to uncheck the checkbox if the label is clicked while the checkbox is checked?  
I believe this will end this confusion once and for all. I see the utility in clicking the label and making it sync once with the volumes module and keep it unsynched.

Thanks.

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<div class="post-metadata">

**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:** [December 3, 2019, 2:29pm UTC](https://discourse.slicer.org/t/volume-rendering-synchronize-with-volumes/9366/2 "2019-12-03T14:29:39Z")

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Thanks a lot for the feedback. I agree that the behavior is confusing. We have added automatic pushing of the button a few places but we will implement this behavior in the widget itself so that it is applied everywhere. Added an issue in the bugtracker to track this: [https://issues.slicer.org/view.php?id=4717](https://issues.slicer.org/view.php?id=4717)