labelAutoFit: Boolean

Setting labelAutoFit to true automatically wraps and/or rotates and/or reduces font size of label when they are too long and overlaps, finds the best-fit and automatically manages label overlapping

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 axisY: {
	
    labelAutoFit: true  // change to false

 }, 
 .
 .
});
chart.render();