By default, the ODS Graphics scatter plot matrix generated with the PLOTS=MATRIX option displays 5 variables. You can control the number of variables displayed with the NVAR= matrix option. Note this option is named NMAXVAR in SAS 9.1. NVAR=ALL requests that all variables in the VAR list be displayed with a maximum of 10. NVAR=n specifies the exact number of variables to be displayed. For example, the following requests 7 variables in the scatter plot matrix:

ods html;
ods graphics on;
   
proc corr data=data plots=matrix(nvar=7);
run;

ods graphics off;
ods html close;