A->0 All values of A are set to 0.
A->1 All diagonal values of A are set to 1, the other to 0.
A->A A will be inverted
A->A A will be transposed:
A->-A Changes the sign of all values of A.
A Fills the matrix A with random values
det A Determinante
Rg A Quality of A
Sum of diagonal elements
C All values are set to 0.
1 All diagonal values are set to 1, the other to 0
With the buttons #A->B" #A<-B" and #A<-C" values can be copied between the matrices