These options are targetted at web developers who are familar with coding
This option allows you to enter a custom Rel attribute as some plugins use the permalink Rel attribute wth their own code.
This option lets you set a custom class name for the permalin as some plugins use a specific class name
Adjust box calculation by
If you manuallly add padding or margins in custom CSS, it can throw out the automatic calculation of the cell widths. This option provides a "fudge" factor to let you comepnsate for that.
Show debug info
When activated, dumps heaps of variables which may be of use to a developer, but is defintiely of use for E+ debugging.