When viewing the variant page, the tooltip has a habit of obscuring interactive chart elements along the top panel such as the clinical view panes and the thresholds dropdown. We should explore methods to obscure the minimum content possible when displaying datum tooltips on the histogram. Some possible options might include:

• An interactive element to show/hide the tooltip
• Showing the tooltip in an area of the chart without data and/or other chart elements
• Showing the selection tooltip in a separate div from the histogram that is displayed independently and guaranteed to not obscure content

Since the hover tooltip is shown only on hover and disappears when the mouse leaves the focus area of a datum element, it isn't as much of a problem that it may obscure interactive elements.