:hardstatus alwayslastline "%-Lw%{+d} %n%f %t %{-d}%+Lw"
- current window is "dimmed" with
%{+d}
and%{-d}
pair %-Lw
and%+Lw
shows before and after current window
see https://www.kilobitspersecond.com/2014/02/10/understanding-gnu-screens-hardstatus-strings/