could you please try the below code and let me know if it helped you. sorry i could not test it %macro test; PROC SQL;    CREATE TABLE WORK.QUERY_FOR__Study_Data AS    SELECT t1.CISBR_ID,           t1.'Local ID'n,    (CASE    %do i = 1 %to 66;     %let j=put(&i,z2.);    WHEN t1.'Local ID'n like "&i.%" then "2-0&j."    %end;   else "."    end)    Format $Char8. as Subject_ID,           t1.'Conc1 pg/mL'n,           t1.'Conc2  pg/mL'n,           t1.'Mean pg/mL'n,           t1.'Laboratory Code'n,           t1.'CISBR Comments to Investigator'n       FROM WORK.Study_Data  t1; QUIT; %mend; %test; Thanks, Jag ... View more

For a small 3x3 with custom labels using GTL, you could build the matrix yourself.  That is what is happening in the background anyway.  Use a LAYOUT LATTICE with a 3x3 row-column layout, and insert the necessary scatter, reg and insets into the cells yourself.  Quite doable, especially for a small matrix. If you want ROWVARS, you can create the appropriate combinations.  The general idea is shown in this article, but you can see what needs to be done and customize to your needs.  Compact Scatter Plot Matrix - Graphically Speaking ... View more