Tandy 1000 MS-DOS Reference Manual page 240

Chapter 10 / EDLIN Command Reference
To list a range of 23 lines centered around the current line, you
need only type
l
I
ENTER
I. The screen shows:
4: list Cl) with different parameters
5: or without any
15:*The current Ilne contains an asterisk.
26: to edit text.
224
r '