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Turn on/off logging a VMD session to a log file. This will create a log file with commands for all the actions taken during the session. The log file may be played back later by using the `play' command or the Tcl `source' command. The only actions recorded are those which change the state of the VMD display, so straight Tcl commands are not saved. All of the core VMD commands will write to the log.

To write log information to the file `off', use the file name `./off'. To have log information appear on the text console, use logfile /dev/tty.