The Expand / $ZEXP screen presents various statistics about the Expand Manager Process. This information is the equivalent of the command "SCF stats process $ZEXP".
The Expand Manager Process supervises the Expand Path and Line handler processes and must be running in order for Expand to be active. Information requests through SCF and the SPI interface are routed through this process.
Unfortunately, the meaning of the values displayed on this screen are not known. The information presented is undocumented and nothing is available (that we can find) to interpret these values. We have included this screen because the information looked interesting.