Custom Field Types

[Anonymous]

Is there a place that defines custom field types and when to use each one?

[Anonymous]

Agreed. Can anyone provide information on that? There isn't any documentation that I can find but I need it. 

[Augie_Kuron]

Just saw this posted elsewhere in the community.  Looks like it should answer your question:

https://community.marketo.com/MarketoDiscussionDetail?id=90650000000PvoOAAS

[James_Glavin]

There's also this article which may be useful:
https://community.marketo.com/MarketoArticle?id=kA050000000LOmJCAW

James