How do you enter the matrix transpose in this tool? In an example they use X' for transpose and it works. But if I try A' * A, it either becomes just A * A, o

How do you enter the matrix transpose in this tool? In an example they use X' for transpose and it works. But if I try A' * A, it either becomes just A * A, or it shows nothing and says " This 4th order tensor cannot be displayed as a matrix. See the documentation section for more details." The documentation also doesn't show how to enter the transpose operator.