I'm having a problem with the mouse wheel zoom setting on my macbook trackpad. The zoom occurs far too quickly for any level of precision. I noted this comment in the dev log:

2004-08-14 [gsherman] 0.4.0devel9 Added mouse wheel zoom. Moving wheel forward zooms in by a factor of 2.

How can I change the settings so that zooming occurs by a factor of 1 or .5?

I'm using QGIS 2.6 Brighton.

3 Answers 3


Open Preferences > Options menu and go to "Map Tools" (see the screenshot below). The Zoom factor will be available on the main window.

For QGIS v3.X provide a zoom factor in percentage :

Zoom wheel QGIS3

For QGIS v2.X, just provide a ratio value : Zoom wheel

Notice that the minimal value is 1.1 ... 1 would just do nothing and a value < 1 would unzoom.

  • 4
    Thank you for this information. Currently I am using 2.14.3 Essen and a zoom factor of 1.1 is my sweet spot for zooming with a apple trackpad.
    – Gert
    Jul 6, 2016 at 9:09
  • 2
    110% for QGIS3, where the values are percentages instead of proportions Jul 19, 2018 at 23:22


setting > option > map Tools > zoom factor



If you zoom out too far and lose your layers, you can right-click on a layer in the Layers Panel and select Zoom to Layer.

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