From https://github.com/phetsims/scenery-phet/issues/652, this sim is a candidate for converting to one of the ZoomButtonGroup subclasses. The Buttons screen of the scenery-phet demo shows the 2 subclasses (screenshot below), PlusMinusZoomButtonGroup on the left, MagnifyingGlassZoomButtonGroup. If you don't want to change the look of the sim, use MagnifyingGlassZoomButtonGroup. If you think the more modern-looking PlusMinusZoomButtonGroup is more appropriate, consult with your sim designer.
I've converted the sim to use MagnifyingGlassZoomButtonGroup. I decided to keep it simple and leave it looking the same and not involve the designers. Besides, I like the magnifying glasses. Closing.
From https://github.com/phetsims/scenery-phet/issues/652, this sim is a candidate for converting to one of the ZoomButtonGroup subclasses. The Buttons screen of the scenery-phet demo shows the 2 subclasses (screenshot below), PlusMinusZoomButtonGroup on the left, MagnifyingGlassZoomButtonGroup. If you don't want to change the look of the sim, use MagnifyingGlassZoomButtonGroup. If you think the more modern-looking PlusMinusZoomButtonGroup is more appropriate, consult with your sim designer.