Command line example
-LogCmds="global Verbose, LogPython Verbose, LogAnimMontage off, LogDeepDriveAgent VeryVerbose"
In DefaultEngine.ini or Engine.ini:
global=[default verbosity for things not listed later]
Defined with DEFINE_LOG_CATEGORY macro
Fatal level logs are always printed to console and log files and crashes even if logging is disabled.
Error level logs are printed to console and log files. These appear red by default.
Warning level logs are printed to console and log files. These appear yellow by default.
Display level logs are printed to console and log files.
Log level logs are printed to log files but not to the in-game console. They can still be viewed in editor as they appear via the Output Log window.
Verbose level logs are printed to log files but not the in-game console. This is usually used for detailed logging and debugging.
VeryVerbose level logs are printed to log files but not the in-game console. This is usually used for very detailed logging that would otherwise spam output.