See attached video. Navigate here and scroll to the bottom of the page: https://plotly.net/reference/plotly-net-layout.html Then hover over near the end of the signature. It will rapidly jitter the screen and phase the tooltip in and out as if it were a strobe light effect. https://user-images.githubusercontent.com/6309070/119002123-714fcc80-b941-11eb-9589-c4f2220efba3.mov