Working with symbols and glyphs

The JavaScript library underlying plotly (plotly.js) has its own special support for specifying marker symbols by name. There are currently many acceptable marker.symbol values, and all the acceptable values can be accessed through plotly.js’s schema(). In addition to the marker symbols, people can also use add_text() to encode data with on-graph text. Moreover, the add_text() function enjoys a lot of the same properties as add_markers().