Is there a way to display the output of a sqlplus command without having to first issue the spool off command?

I am spooling the results of a sqlplus session to a file while at the same time tailing the file. The reason for this is that for table with very long rows the format is easier to look at from a file. The problem is to see the output i have to issue the spool off command everytime i run a command in sqlplus.

Can i configure sqlplus so that after i have issued the spool command all the output is viewable straight away on the file.

(Formating the way the rows are displayed on the screen is not an option. )

THanks