Can't zoom using web client

Hello, thanks for an incredible resource. Just getting to grips with its enormity!

I can’t for the life of me get the web version to zoom in or out; tried pg up/dn, +/-, and all combinations of mouse keys. Ok I’m using a marble mouse (trackball) and trying its emulation of the scroll wheel, but none of the above work. Is this as it should be, and only available in the downloadable app version?

Kind regards,
Matt.

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@AstroMoose That doesn’t sound good - zoomability is one of the huge strengths of WWT and it should definitely work. The scrolling ability on a mouse should be the way to zoom, @pkgw might have a better idea of any keyboard zooming functions.

What browser are you using? Do you have any other mouse/trackpad to test if it will zoom with other hardware?