CiviCRM Admin Utilities modifies CiviCRM's behaviour in single site and multisite installs. It does a number of useful things:
Modifies the styling of the CiviCRM menu to fix a number of issues
Allows you to choose which Post Types the CiviCRM shortcode button appears on
In WordPress multisite, allows you to hide CiviCRM on sub-sites
Refer to the plugin page in the WordPress plugin directory for a detailed description, requirements, and installation instructions.