Matrices can be typed in by row or edited in the matrix editor. The editor is accessed by pressing .

Then, select a name for the matrix by selecting one of the numbers on the list and enter the dimensions of the matrix. For example, to create a 2 x 3 matrix (2 rows 3 columns) named A, press

The "1 , 1 = 0" on the bottom of the screen means that the row 1, column 1 entry is 0. Navigate among the rows and columns using the cursor keys.
Press the key to move to the next element on the right and from the end of one row to the beginning of the next.

Note: When viewing a matrix to large to fit on the screen the TI will indicate this with ellipses (...) to the right and/or left, and an arrow top and/or bottom. Use the cursor keys to see more.