The first of these methods consists in an adjacency matrix that positions the LCA in points on the "x" axis and the line length in picas on the "y" axis. The matrix is used by locating the number closest to the previously calculated LCA on the left column of the matrix and then scan across the columns the number of characters that one would like to set in the text line. Once the number is located, the top row of the selected column will indicate the ideal line length.