The option enableMatrixLayout enables automatic matrix layout for nodes sharing the same set of parents and children in the diagram. The matrix forms a square shape. If the matrix outgrows the screen width, it makes diagram navigation complicated. The maximumColumnsInMatrix option limits the maximum number of columns and forces the matrix to grow vertically instead of horizontally. The option minimumMatrixSize sets the minimum number of nodes needed to be shaped into matrix formation.
The family diagram provides options to control grouping nodes into matrixes per node. The option addToMatrix lets you explicitly prohibit adding nodes into any group of matrixed nodes. And the matrixId option allows you to group nodes into multiple matrixes.