IAI America IA-T-XA (ANSI standard CE mark agreement) - Manual (Page 107)

(10) Subroutine
Select the F2 (SubR) key on the Sym-Mdfy screen.
Mode flow:
Subroutine No. symbol edit screen
Since the subroutine No. is in the local area,
enter the program No.
Enter a symbol with alphabet/numeric values.
Enter the subroutine No. with the PAGE UP and PAGE DOWN keys or the ten-key numeric pad.
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