Open Bug 1637681 Opened 4 years ago Updated 3 years ago

Expose pinch zooming to scrollwheel users via appropriate modifier key


(Core :: Panning and Zooming, enhancement, P3)





(Reporter: kats, Unassigned)


(Depends on 2 open bugs, Blocks 1 open bug)


Excerpt from email thread with :mbalfanz about UX considerations for desktop zoom:

Provide keyboard modifier for scroll wheel:

This one is a bit trickier. It would be great to introduce a keyboard modifier for mouse support!
We will need to select the right modifier key. As far as I can tell, on Mac both ctrl and cmd trigger reflow zoom. On Windows, only ctrl does. I'm no Windows user, so please somebody correct me here. One suggestion could be to use opt+scroll on Mac, and alt+scroll on Windows.

Looking at the prefs, macOS does indeed map both ctrl and command to reflow zoom. Maybe command can be repurposed. Opt/alt+scroll is already in use for page navigation on both Windows and Mac.

Still needs dispatch to content hooked up as otherwise sites like google maps will not work.

Depends on: 1658009
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