You can change the width of the NAME, TYPE and VALUE of “show parameter” in SQL/Plus.
SQL> show parameter sga NAME TYPE ------------------------------ ------------------------------ VALUE------------------------------ lock_sga boolean FALSE pre_page_sga boolean FALSE sga_max_size big integer 300M sga_target big integer0 SQL> column NAME_COL_PLUS_SHOW_PARAM format A20 SQL> column TYPE format A20 SQL> column VALUE_COL_PLUS_SHOW_PARAM format A20 SQL> show parameter sga NAME TYPE VALUE -------------------- -------------------- -------------------- lock_sga boolean FALSE pre_page_sga boolean FALSE sga_max_size big integer 300M sga_target big integer 0