how to remove BY group variables in title in rtf output

[HitmonTran]

I am using the BY statement in proc report  but it's display the BY variables in the titles that I don't want.  I tried using title10="  "; but it still display. 

How do I get rid of it (see the red circle in screenshot below)?

 title8 j=l "Laboratory Parameter: #byval2";
  title9 height=9pt j=l "Treatment Group: &trt";

    proc report data=final nowindows spacing=1 headskip headline split='|' spanrows;
      by trtgrp param;

      column  avisitn avisit atoxgrn lbtox (/*"^S={borderbottomcolor=black borderbottomwidth=1} Baseline Result"*/'Baseline Result' col1-col5);
 
	  define avisitn   / order noprint;
	  define avisit    / group " " style(column)={asis=on width=2.8in just=left} style(header)={just=center};
	  define atoxgrn   / order noprint;
	  define lbtox     / order " " style(column)={width=1.4in just=left} style(header)={just=left};
	  define col1      / display "Normal" style(column)={width=.9in just=center} style(header)={just=center};
	  define col2      / display "Grade 1" style(column)={width=1.2in just=center} style(header)={just=center};
	  define col3      / display "Grade 2" style(column)={width=1.2in just=center} style(header)={just=center};
	  define col4      / display "Grade 3" style(column)={width=1.2in just=center} style(header)={just=center};
	  define col5      / display "Grade 4" style(column)={width=1.2in just=center} style(header)={just=center};
 

	 compute after avisitn;
	     line @1 " ";
	  endcomp; 
 
  run;

[PaigeMiller]

title;

This gets rid of all titles.

Alternatively, you could just remove the specific titles you don't want. Depending on the user interface you are using, you could access them individually; in base SAS you type title into the text bar at the top right and modify the titles individually.

[Tom · Accepted solution]

So not in the user defined titles but in a separate BY LINE?

Use the option NOBYLINE.