Positioning the pointer.   move the pointer to top of memory, press RTN in RUN mode.   To move the pointer to a label, press in RUN mode, GTO n, where n is the same digit or top row key as in LBL n (the label).   To step through your program, use SST in W/PRGM mode. You will see the successive program codes in the display. Insert:   Pressing a key in W/PRGM mode stores the instruction code in program memory between the displayed code and the following instruction code and moves the pointer to display the code just inserted. The bottom location drops off.   Insert is not performed:   (1) For PRGM, DEL, SST. (3) For the second key of a merged code. (3) When the pointer is at the bottom.