Vectors, Matrices, and Tables > Working With Arrays > To Display Indices of a Large Matrix
  
To Display Indices of a Large Matrix
1. In a worksheet, select or create a matrix that contains more than 12 rows or more than 12 columns.
2. Evaluate the matrix.
The matrix indices are displayed until you click outside the matrix region.
3. To toggle the display of matrix indices, select the matrix region, on the Matrices/Tables tab, in the Result Format group, click Show Indices.