dhtmlxscheduler-see-next-more-months

gistfile1.js

At dhtmlxscheduler_debug.js , near line number : 2436

Default you can see one month :
scheduler._reset_month_scale=function(b,dd,sd){
    
	var ed=scheduler.date.add(dd,1,"month");



With month view to see next 3 month :
scheduler._reset_month_scale=function(b,dd,sd){
    
	var ed=scheduler.date.add(dd,3,"month");