MySQL Workbench Model sync sql_mode
MySQL takes his configuration from the my.cnf/ini file where you can activate or disable the modes or options.

There is also the possibility to put options to the program when it starts. 

Please read up on the sql Modes or configuration that you want to change, but remember  the defaults are there for a cause, but the Mysql homepage has usual a  lot to tell about see, but read the warnings carefully. Everything could end in disaster.

I alos din't know where you see t taht the sql is empty, i am guessing that you mean https://dev.mysql.com/doc/workbench/en/wb-preferences-general-editors.html

Bujt that is as you can see something different