Anyone have any experience to adding custom actions to forms? Such as buttons? I have added a button but there is a field on the custom form entry that says function, however I am not sure where and how to define this function.

You can create a client script which is deployed to the record for the given form, or you can link a client script directly to the form.

Any chance you have a example, interwebs is coming up fairly dry…

I’ll DM you

@erictgrubaugh has explained how to add a button and its functionality very well here.