Hello,
You will have to change the path from the MySQL configuration file. You can refer to MySQL documentation on how to enable error and slow query log and also to set a path for it here >> http://dev.mysql.com/doc/refman/5.7/en/slow-query-log.html, http://dev.mysql.com/doc/refman/5.7/en/error-log.html
After setting up the path, you just need to click on “Fetch” (Edit server -> Advanced settings -> MySQL error log) button and MONyog will fetch the path specified in the configuration file and display the content of the log files.
Regards,
Pankaj
Team MONyog.