PROC PRINT prints PROCLIB.STAFF. The FORMAT statement associates the USCURR. format with Salary for the duration of this procedure step only. The LABEL statement associates the label with Salary for the duration of this step only. 
proc print data=proclib.staff noobs label;
   label salary='Salary in U.S. Dollars';
   format salary uscurr.;
   title 'PROCLIB.STAFF with a Format for the Variable Salary';
run;