Texas Instruments TI-83 PLUS - Manual (Page 267)

TI-83 Plus Matrices 264
Editing-Context Keys
Key Function
| or ~ Moves the edit cursor within the value
† or } Stores the value displayed on the bottom line to the
matrix element; switches to viewing context and moves
the rectangular cursor within the column
Í Stores the value displayed on the bottom line to the
matrix element; switches to viewing context and moves
the rectangular cursor to the next row element
‘ Clears the value on the bottom line
Any entry character Copies the character to the location of the edit cursor on
the bottom line
y 6 Activates the insert cursor
{ Deletes the character under the edit cursor on the bottom
line