How to make ArcRotateCamera panning by left key?

Questions
1

I wanna do panning by left key instead. Also, how to make scroll to zoom camera instead of adjusting radius?

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3

Thanks for answering, but I still don’t know how to solve my question

4

With some trying, I found that I can set camera._panningMouseButton = 0 to make user do panning by left key.
But I have still no idea how to make scroll to zoom camera instead of adjusting radius

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