This command appears in the Matrix menu. It allows direct specification of the number of rows and columns of a matrix. In this window, you can also define a range for X-values and Y-values. These X and Y ranges will be used in new plots as the initial scale ranges.
They are also available via the *x* and *y* variables if you choose to define the contents of the matrix with the Set Values Dialog.

You can also define a *Long Name*, *Units* and *Comments*
for X / Y / Z coordinates under the *X Labels*, *Y Labels* or *Z Labels* tab.
These labels can be used as X / Y /Z axis labels in 3D graphs.