Hi,
Currently, queries using FORCE INDEX, USE INDEX and IGNORE INDEX are not supported by SQLyog Formatter.
We will improve this once we plan for an enhancement. Right now priority is not set.
We added your request in the issue tracker,
http://code.google.com/p/sqlyog/issues/detail?id=1174
BTW
FYI other formatting issues are listed here and all will be considered later while enhancing this feature,
http://code.google.com/p/sqlyog/issues/detail?id=979
http://code.google.com/p/sqlyog/issues/detail?id=1112
Thanks & Regards,
Khushboo