1.4.2.5. - More Details
After scans.4 reads and indexes a data file, it remembers the file length. If you answer affirmative to the
Change modes?
query,
scans.4
will add to the index if the file has lengthened.
If you give a dot (
.)
as the command line argument or in response
to
Scans/options
query,
the previous argument or option string will be used.
That is, the string is
remembered, not the options
chosen interactively using
Change modes?
For instance, if
you enter a long sequence of scan numbers and read in the scans,
then change something via
Change modes?,
you can simply enter
a dot in response to
Scans/options
and recover the previous
sequence of scan numbers.
When you do enter a string of flags and scan numbers, the modes set by the flags only apply to the scans that follow the flags and not the preceding scans.