There's a little bar with buttons that appears when you hover at the top of a plotly graph. It is called the 'modebar'. There is essentially no documentation on customizing it, so I've typed up what I've done to help the next person who needs this.

Luck is a massive factor in fantasy football...

From Earth, Mars appears to move backwards sometimes. How does this happen if it's in an elliptical orbit around the Sun?

Imagine you have some measurements and you want to approximate an underlying model for them. Shouldn't you pick the one that most closely matches the data?