Texas Instruments TI-83 PLUS - Manual (Page 621)

TI-83 Plus Memory and Variable Management 618
6. Press } and † to move the selection cursor ( 4 ) next to the first item
you want to copy into a group, and then press Í . A small square
will remain to the left of all variables selected for grouping.
Repeat the selection process until all variables for the new group are
selected and then press
~ to display the
DONE
menu.
7. Press Í to complete the grouping process.