I came across the following post: http://www.episerver.com/en/EPiServer_Knowledge_Center/Developer-Forum2/EPiServer-Developer-Forums-/2366/4991/ Could anyone tell me if this has been done? I would like to create a custom property that allows the user to select some settings (while in admin mode and setting up a property on a page type) that decides how the property is used in edit mode. For example, if the property is based on Long String, you get a loac of editor properties that allow you to switch on/off certain functions. Any information or help would be good. If it is not something that can be done, then please let me know so that I can stop looking. Many Thanks Carl