There is no way to turn off the value in the tooltip, but you can override
the tooltips with your own contents using a "tooltip" column
role<https://developers.google.com/chart/interactive/docs/roles#whatrolesavailable>
.
On Thursday, July 26, 2012 4:40:44 PM UTC-4, Dan Poynor wrote:
>
> I'm using the region format and only want the country name (region
> location) to appear in the tooltip on rollover.
>
> Instead I'm getting both the region location and the region color value.
>
> This option will make the tooltip color red, but the color code value
> still appears:
> tooltip: {textStyle: {color: 'red'}, showColorCode: false}
>
> Thanks,
> DAN
>
>
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