On the web at least I am used to ctrl/cmd+scroll to zoom, shift+scroll for horizontal pan and scroll for vertical scroll.

Middle mouse drag should definitely pan.

We found trackpad/mouse in the browser to be a bit of a headache. This stackoverflow thread talks about the problems.

https://stackoverflow.com/questions/10744645/detect-touchpad...

I believe this is a matter of individual preference and I think providing users with options to change these mechanics would be great! I 100% agree that center mouse + move should pan. But I also prefer the current scroll and I would like Shift+Scroll to scroll horizontally (as it does on any other web page).

Thanks for letting us know your preference here, will look into it!

Thanks for letting us know, we'll look at getting those fixed.