# Editor and Crop Volume modules

**URL:** <https://discourse.slicer.org/t/editor-and-crop-volume-modules/1061>\
**Category:** Support\
**Created:** [September 15, 2017, 3:51pm UTC](https://discourse.slicer.org/t/editor-and-crop-volume-modules/1061 "2017-09-15T15:51:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Researcher\_2017](https://avatars.discourse-cdn.com/v4/letter/r/da6949/32.png) [@Researcher\_2017](https://discourse.slicer.org/u/Researcher_2017)\
**Post date:** [September 15, 2017, 3:51pm UTC](https://discourse.slicer.org/t/editor-and-crop-volume-modules/1061/1 "2017-09-15T15:51:40Z")

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I am using 3D Slicer version 4.6.2 to convert MRI data into a 3D representation of a head. I have two questions -

1. When I use the “Paint Effect” in the Editor Module to fill in empty spaces and then I use “Make Model Effect” to create a new model, I cannot undo changes in the previous model. Is there any solution to this?

2. Also, I am having issues using the Crop Volume module. I initially created an island around the head in the Editor module, which essentially built a cube around the head, and then applied that to create a new model. I am now trying to use the Crop Volume module to make the cube smaller and the program is not allowing me to do this.

Any help would be appreciated. Thanks!

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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:** [September 15, 2017, 4:03pm UTC](https://discourse.slicer.org/t/editor-and-crop-volume-modules/1061/2 "2017-09-15T16:03:37Z")

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It should all work well if you use latest nightly version of Slicer and the Segment Editor module (instead of the legacy Editor module).