How To Draw a Rectangle on a Plot in Matplotlib? - Data Viz with Python and R
Scatter plots with a legend — PyGMT
python - Matplotlib - How to make the marker face color transparent without making the line transparent - Stack Overflow
How to Change the Transparency of a Graph Plot in Matplotlib with Python
3D Scatter transparency not activated by marker.color or marker.line.color as well as line.color and errorbars alpha channel · Issue #3492 · plotly/plotly.js · GitHub
python - How to make Matplotlib scatterplots transparent as a group? - Stack Overflow