I have a requirement to add a string of help text to each field on a node type. For example, one of the fields is called parcel size (ha) which is a physical dimention. I also need to add an icon to the field which will display some help text on the rendered content node. I need to be able to apply help text to all possible field types so I need to be able to put together a module which will hook into the field API on a low level and add the help text orm element when I am initially creating the field on the content type in admin.
Creating the field type as a decimal and styling it in the the,e isnt a problem, but working out how to alter all fields currently has me stumped. Any pointers om what hooks to use and how to go about this would be grearly appreciated.