Allows display of random quotes via shortcode, a sidebar widget, and/or on the admin page. Quotes can be user-entered, post excerpts or links.
tagoverridewhich overrides whichever option is set in the options page for which HTML tag to use. This is useful for changing the tag when something should be inline or block.
additionalclassesis used for adding additional CSS classes to the nicequote. See This page for a listing of built-in WordPress classes, for reference.