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b290 custom renderers now have an admin site/controlpanel addin interface. All custom renderers must be enabled before use. The location of the script for the renderer can be anywhere the system administrator finds convenient; if it is in the #tools subtable of a Manila website, its use will be restricted to that website. The Custom renderers API was inherited from metadata and is unchanged, their purpose is to render a form element for one variable. Custom renderers in the legacy location (a table in the addedValues storage sub-table of each website) , will continue to work as before; however they must be installed anew in each site that uses them, whereas the server wide settings permits shared renderers.