toolbar parameters in show

In an interactive plot, what controls the display in the bottom right hand corner of the frame? Thanks.

I hope this illustrates the parameter I inquired about. I would like to be able to control the number in brackets. Thanks!

This is not well documented, but there is a PR that adds documentation for it. See DOC: document fmt_xdata, fmt_ydata, and fmt_zdata by tacaswell · Pull Request #25187 · matplotlib/matplotlib · GitHub