This item is only enabled under System 7 or later.
If ticked, this flag tells to include an extra parameter in the
``open file'' event sent when you type ``e'' in response to
TEX's ``?'' prompt (which normally occurs after a TEX error).
The extra parameter specifies the line number so your editor can
automatically select the line containing the error.
However, some editors can't handle the extra parameter and won't even open
the file. You will need to experiment with your editor to see if it can
select the error line; if it can't then make sure ``Select Error Line'' is
not ticked. Note that AlphaLite supports the extra parameter.