Zoom with mouse wheel only when alt key is pressed #2221
Merged
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Default mouse wheel to zoom is rather obnoxious since large area of the
TensorBoard is zoomable area.
Note that preferably we'd want to provide some tooltip or help to make
this feature discoverable but simple hack using
HTMLElement.titlefelt verydisturbing and poor. We, in later time, might want to consider doing what
Google Map does on mobile (when scroll event happens inside the zoomable
area, it shows shows a transparent splash describing how to zoom). Note that
none of these solutions are friendly to the screen reader softwares.
Fixes #2214.