# Adjust Window Level is not working (nightly release 4.11.0)

**URL:** <https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817>\
**Category:** Support\
**Created:** [May 16, 2019, 2:22pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817 "2019-05-16T14:22:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![JoostJM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/joostjm/32/1091_2.png) [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Post date:** [May 16, 2019, 2:22pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817/1 "2019-05-16T14:22:21Z")

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In the latest nigthly release (13-05-2019, windows), adjusting window/level by left-click + dragging is not working anymore. It is still possible to adjust window/level through the Volumes module however.

Furthermore, when checking the interactorstyle, it shows that AdjustWindowLevelForeground and AdjustWindowLevelBackground are enabled.

```auto
>>> interactorStyle = slicer.app.layoutManager().sliceWidget('Red').sliceView().sliceViewInteractorStyle()
>>> interactorStyle.GetActionEnabled(interactorStyle.AdjustWindowLevelForeground)
True
>>> interactorStyle.GetActionEnabled(interactorStyle.AdjustWindowLevelBackground)
True

```

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [May 16, 2019, 2:43pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817/2 "2019-05-16T14:43:34Z")

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HI Joost,

Mouse modes have recently changed. To window/level you need to switch to W/L mode by clicking on the button on the toolbar that is activated in this screenshot:  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/b/cb0efdef9970062e2f46839e8477554354ad1b11.png)

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<div class="post-metadata">

**Author:** ![JoostJM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/joostjm/32/1091_2.png) [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Post date:** [May 16, 2019, 2:44pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817/3 "2019-05-16T14:44:58Z")

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@cpinter Thanks! Is there a way to set the default to W/L adjustment on startup?

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<div class="post-metadata">

**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [May 16, 2019, 2:51pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817/4 "2019-05-16T14:51:41Z")

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You can put this in the slicerrc.py

```
appLogic = slicer.app.applicationLogic()
interactionNode = appLogic.GetInteractionNode()
interactionNode.SetCurrentInteractionMode(slicer.vtkMRMLInteractionNode.AdjustWindowLevel)
```

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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:** [May 16, 2019, 2:52pm UTC](https://discourse.slicer.org/t/adjust-window-level-is-not-working-nightly-release-4-11-0/6817/5 "2019-05-16T14:52:20Z")

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See some more information about the feature here: [Feedback requested: How to improve mouse interaction in views?](https://discourse.slicer.org/t/feedback-requested-how-to-improve-mouse-interaction-in-views/6420)