If a number is the first non-whitespace in the line, it is assumed to be a line number and is moved to columns 0 through 4. (Columns are always counted from 0 in SXEmacs.) If the text on the line starts with the conventional Fortran continuation marker ‘$’, it is moved to column 5. If the text begins with any non whitespace character in column 5, it is assumed to be an unconventional continuation marker and remains in column 5.
Line numbers of four digits or less are normally indented one space.
This amount is controlled by the variable
which is the maximum indentation a line number can have. Line numbers
are indented to right-justify them to end in column 4 unless that would
require more than the maximum indentation. The default value of the
variable is 1.
Simply inserting a line number is enough to indent it according to these
rules. As each digit is inserted, the indentation is recomputed. To turn
off this feature, set the variable
nil. Then inserting line numbers is like inserting anything else.