Control the verbosity of XSPEC.
XSPEC> chatter <chatter level> <log chatter>
where <chatter level> and <log chatter> are integer values. The initial value for each argument is 10. Higher values will encourage XSPEC to tell the user more, lower values tell the user less, or make XSPEC ``quieter." <chatter level> applies to the terminal output, while <log chatter> controls the verbosity in the log file. Currently, the maximum chattiness is 25. Values below five should be avoided, as they tend to make XSPEC far too obscure. Some commands may temporarily modify the chattiness, such as the error command. A chattiness of 25 will generate a lot of debug output.