The set, show and clear commands allow the user to control the parameters for the extract and other commands.
The set commands allows the user to set the binsizes, and the column names for PHA, X and Y in the event list which will be used in the extract command. You can also set the instrument and the plot devices through the set command. To restore the defaults for the missions currently supported by Xselect use the set mission command.
The clear command clears the various filters, and it can also clear product files, like those from faint, and return Xselect to the original data.
The save command saves the various product files. Also, the save session command will save the state of the session on exit. This can then be restored at the start of the next session.
Finally the show command is useful for displaying various elements of Xselect. In particular, the show status command gives a thumbnail sketch of the current state of Xselect.