Setting the zoom level

[funder7]

Hello,

I'm creating an export with multiple sheets.
Inside one sheet class, I've implemented the WithEvents concern + RegistersEventListeners trait.

Then I've tried to set the zoom level to "80%" this way:

    public function afterSheet(AfterSheet $event)
    {
        $event->sheet->getSheetView()->setZoomScale(80);
    }

It doesn't work, the zoom remains at 100%.

Do you know why?