You can define the start and end values for axis in XAXIS, YAXIS values.    something like: YAXIS values=(&min to &max by 0.1)   You can get the max and min values from the dataset using proc sql INTO;   proc sql; select max(var1),Min(var2) into: max,:min from have; quit;   If you want the yaxis to extend then add values to max like: YAXIS values=(&min to &max+2 by 0.1)   Check this example how to increase the yaxis lines: proc sql; select max(weight)+50,min(weight) into: max,:min from sashelp.class; quit; options symbolgen; proc sgplot data=sashelp.class; scatter x=height y=weight / group=sex; yaxis values=(&min to &max by 20); run; If you still don't get then please provide your sample data in the form of data step. Someone can sure help you if you clearly provide your requirement.  https://communities.sas.com/t5/SAS-Communities-Library/How-to-create-a-data-step-version-of-your-data-AKA-generate/ta-p/258712 ... View more