Control zoom, slicing and contrast windowing with mouse and touch screen
You find the mouse control panel in the menu Tools > Utilities > Mouse controls
After clicking the Zoom button 
, you can click in the napari canvas and move the mouse up and down to zoom in and out.
After clicking the Slicing button 
, you can control the currently displayed slice by moving the mouse.
By moving the mouse up and down, you control the currently selected Z-plane.
By moving the mouse left and right, you control the currently seleted time point.
After clicking the Windowing button 
, you can modify the brightness and contrast by moving the mouse.
By moving the mouse up and down, you control window width of the range of displayed grey values (max - min).
By moving the mouse left and right, you control the center of the grey value window.
Click the Default button 
to return to napari's normal mode.
This napari plugin was generated with Cookiecutter using with @napari's cookiecutter-napari-plugin template.
You can install napari-mouse-controls via pip:
pip install napari-mouse-controls
Contributions are very welcome. Tests can be run with tox, please ensure the coverage at least stays the same before you submit a pull request.
Distributed under the terms of the BSD-3 license, "napari-mouse-controls" is free and open source software
If you encounter any problems, please create a thread on image.sc along with a detailed description and tag @haesleinhuepf.