In the worksheet, for example...
set linesize 120
You can also use Tools > Preferences > Database to specify which SQL file to run as a startup script and put that set linesize command in it. Be aware, however, of a bug in 4.1.1 which prevents variable substitution if a startup script is specified (the Substitution cancelled bug):
No patch is expected? We must deploy a script on all the sql developer of the business?
It is the same behaviour as in SQL*Plus. What do you expect as patch? You need to set your linesize, others might need shorter/longer lines.
the behavior and defaults were changed to mirror SQL*Plus
How configuration file can I put the path that points to my startup script referenced in :
"Tools > Preferences > Database to specify which SQL file to run as a startup script and put that set linesize command in it "
Just write your own SET commands like
SET LINESIZE 200