How to have a combined hover tooltip for multiple images on a tile map?

[ahuang11]

You could separate the hover from the image and put it on the side like

Example of using holoviews TapStream with Panel

Here is a minimal example using the tap stream: import panel as pn import holoviews as hv pn.extension() points = hv.Points([]) stream = hv.streams.Tap(source=points, x=np.nan, y=np.nan) @pn.depends(stream.param.x, stream.param.y) def location(x, y): return pn.pane.Str(f'Click at {x:.2f}, {y:.2f}', width=200) pn.Row(points, location) [Screen Shot 2020-02-01 at 2.47.38 PM]

(Instead of a tap stream, you can make it a continuous follow Pointerxy)
http://holoviews.org/user_guide/Custom_Interactivity.html

But if you do want a single hover tooltip, it’s an underlying bokeh issue I think, or you can try writing your own javascript (no idea how though :D, https://docs.bokeh.org/en/latest/docs/user_guide/tools.html#custom-tooltip)