Function: _def_log
Class: default
Section: default
C-Name: sd_log
Prototype:
Help:
Doc: this can be either 0 (off) or 1, 2, 3
(on, see below for the various modes). When logging mode is turned on, \kbd{gp}
opens a log file, whose exact name is determined by the \kbd{logfile}
default. Subsequently, all the commands and results will be written to that
file (see \b{l}). In case a file with this precise name already existed, it
will not be erased: your data will be \emph{appended} at the end.
The specific positive values of \kbd{log} have the following meaning
1: plain logfile
2: emit color codes to the logfile (if \kbd{colors} is set).
3: write LaTeX output to the logfile (can be further customized using
\tet{TeXstyle}).
The default value is \kbd{0}.