Hover tooltips at fixed position

Hi

1 How can the tooltips be shown at a fixed position, not at the position of the cursor ?
2 How to show crossshairs with indicator at the position of the cursor ? (spikemode=“across” spike lines can show a crossshairs but missing indicator)

Can you please help on this.
Thanks !

It seems to me that this should be possible via either of the following:

  1. Using Plotly Python + Plotly.js as per Streamlit components - Scatterplot with selection using Plotly.js - DEV Community and How to customize Plotly Tooltip.
  2. Using Dash as per How to customize the tooltip? - #4 by chriddyp.