Add and customize hover tooltips on Altair scatter plots, including formatting values and showing computed fields.

Combine multiple Altair charts with layering (operator +) and concatenation (| and &).

Set custom axis titles and number formatting in Altair with alt.X, alt.Y, and alt.Axis.

Learn how to save and export Altair charts in multiple formats including PNG, SVG, and HTML

A brief introduction to the Altair Python visualization library