In examples such as this one: https://plot.ly/12/~streaming-demos/, by using the designer tools under axes > Labels > Hover Format I am able to change the format of the time x-axis tooltip to something like "%y/%m/%d %I:%M%p"). How do I achieve the same thing in code?
I have been through the reference (https://plot.ly/javascript/reference/) and can't find anything on this.