IAI America IA-T-XA (ANSI standard CE mark agreement) - Manual (Page 44)

Select the F1 (Mdfy) key on the Prog screen.
The display changes to the Mdfy screen. Press the
return key once to move the cursor to the location for
step No.
Insert one-line step between the program steps No.
2 and No. 3. Enter 3 with the ten-key numeric pad or
press the PAGE UP key twice to display 3.
Select the F1 (Ins) key.
“Ins” is displayed next to Mdfy.
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