HP -15C Owner's Handbook Manual page 84

84 Section 7: Program Editing
Let's start at the end of the program and work backwards. In this way, deletions
will not change the line numbers of the preceding lines in the program.
Keystrokes
| ¥
t " 020
(or use Â)
Display
000-
020-44,40, 3
Program mode. (Assumes
position is at line 000.)
Moves position to line 020
(instruction O + 3.)