# Interactive Zoom Mouse Drag Direction

**URL:** <https://discourse.slicer.org/t/interactive-zoom-mouse-drag-direction/17832>\
**Category:** Support\
**Created:** [May 27, 2021, 10:34pm UTC](https://discourse.slicer.org/t/interactive-zoom-mouse-drag-direction/17832 "2021-05-27T22:34:06Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [May 27, 2021, 10:52pm UTC](https://discourse.slicer.org/t/interactive-zoom-mouse-drag-direction/17832/2 "2021-05-27T22:52:36Z")

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Reviewing the current state of your [SlicerQReads](https://github.com/KitwareMedical/SlicerQReads) custom app, it appears you are using a [modified Slicer version](https://github.com/KitwareMedical/SlicerQReads/blob/d40ce875aa49f396fc8fe2b578e477d6cd02894f/CMakeLists.txt#L15-L16) that has already swapped some zoom/pan functionality for mouse clicks by way of [this commit](https://github.com/KitwareMedical/Slicer/commit/9acdfe886eac90326c3a7075d2ae91c846eecccd). For inverting zoom in/out based on those mouse interactions I would suggest to look in those same files as that commit to then invert some more logic.

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_[View the full topic](https://discourse.slicer.org/t/interactive-zoom-mouse-drag-direction/17832)._