Inserting And Deleting Command Lines - Texas Instruments TI-83 Manual Book

Inserting and Deleting Command Lines

To insert a new command line anywhere in the program, place the
cursor where you want the new line, press y 6, and then press
Í. A colon indicates a new line.
To delete a command line, place the cursor on the line, press ' to
clear all instructions and expressions on the line, and then press { to
delete the command line, including the colon.
TI-83 Plus Programming 508