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I have the Logitech MX Master 3 and really wanted to set my mouse up to do just that, but couldn't figure out how to do it with Affinity Photo. It appears you can do it in Photoshop, however. I haven't tried it in Photos.
 
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In Photos app, if you move the zoom slider to the right (any value other than "Fit"), then you can zoom with your scroll wheel while holding the Command key.
Tried this on an old Logitech, and a Dell mouse.
 
In Photos app, if you move the zoom slider to the right (any value other than "Fit"), then you can zoom with your scroll wheel while holding the Command key.
Tried this on an old Logitech, and a Dell mouse.
Thanks, I can confirm that this works. And I can also enable zoom mode (i.e. any other value than "Fit") by pressing the Z key. Great to finally find a solution!
 
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