# Ctr-Z-function in Slicer

**URL:** <https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [September 27, 2018, 11:44am UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207 "2018-09-27T11:44:11Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![persst](https://avatars.discourse-cdn.com/v4/letter/p/46a35a/32.png) [@persst](https://discourse.slicer.org/u/persst)\
**Post date:** [September 27, 2018, 11:44am UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207/1 "2018-09-27T11:44:11Z")

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Operating system: Windows 10  
Slicer version: 4.9

Hi!  
I am segmenting brain tumors from DICOM data and wonder if Slicer has any quick-button to erase your previous action, like Ctr+Z?

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [September 27, 2018, 12:01pm UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207/2 "2018-09-27T12:01:30Z")

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It’s just ‘z’ (no control modifier)

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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 27, 2018, 2:14pm UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207/3 "2018-09-27T14:14:59Z")

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See list of all keyboard shortcuts here: [https://slicer.readthedocs.io/en/latest/user\_guide/modules/segmenteditor.html#keyboard-shortcuts](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#keyboard-shortcuts)

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**Author:** ![mikebind](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Post date:** [June 1, 2020, 10:57pm UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207/4 "2020-06-01T22:57:50Z")

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Link is dead, looks like this might be the updated equivalent: [https://slicer.readthedocs.io/en/latest/user\_guide/user\_interface.html#mouse-keyboard-shortcuts](https://slicer.readthedocs.io/en/latest/user_guide/user_interface.html#mouse-keyboard-shortcuts)

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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 2, 2020, 12:08am UTC](https://discourse.slicer.org/t/ctr-z-function-in-slicer/4207/5 "2020-06-02T00:08:51Z")

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Thanks, I’ve updated the link of Segment editor shortcuts now. What you’ve found is the general application/viewer shortcuts.