The SQLyog Schema Designer wil create the tables directly. No need to run SQL manually ('forward engineer' or whatever). Also Schema Designer supports (only) import and export from and to it's own XML format (for saving 'layouts')
The documentation (help .. help menu) documents it like this:
Quote:
Whatever you add or change from the Schema Designer will be stored to the database exactly the same way as when you work with the menu's of the program. There is no need to 'upload', 'apply', 'synchronize' the LAYOUT or anything like that. SQLyog Schema Designer is a graphical implementation of direct client functionalities. We work with the database that we are connected to – not with any kind of 'model' internal for the program.