titleFontWeight: String

Sets the Font Weight used in the Axis Title. It can be set to one of the options below.

Default: “normal”
Options: “lighter”, “normal”, “bold” , “bolder”

var  chart =  new  CanvasJS.Chart("container",
   titleFontWeight: "bold",

Try it Yourself by Editing the Code below.

If you have any questions, please feel free to ask in our forums.Ask Question