+@option{-x} option can be used to enable tracing (@code{set -x}) of the
+currently run shell script @file{.do} file. @option{-xx} option enables
+tracing for all invoked @file{.do} files further.
+
+With @option{-j} option you can enable parallel builds, probably with an
+infinite number of workers (@code{=0}). Also you can set
+@env{$REDO_JOBS} to automatically apply that setting globally.
+
+Read about @ref{Logs, log storage capabilities}.
+
+@option{-log-pid} (@env{$REDO_LOG_PID=1}) can be used to prefix job's
+@code{stderr} with the PID, that could be useful during parallel builds.
+@option{-d} (@env{$REDO_DEBUG=1}) enables debug messages.
+
+@option{-no-progress} (@env{$REDO_NO_PROGRESS=1}) and
+@option{-no-status} (@env{$REDO_NO_STATUS=1}) disable statusline and
+progress display. @env{$NO_COLOR=1} disables progress/debug messages
+colouring.