I have a problem with the interactions between the Sign and Documents Apps.

I want to create a workflow where documents created in other apps can be sent to be signed with Sign app. However, if I try to do that directly from Documents and try to sign the document when I do it, I cannot save it since it claims that it comes from read-only source (I have tried using different folders to no avail). Fine. However, it seems it should be possible since sending documents to Sign is an allowed action....

Well, suppose signed documents are special, but then I would like, at least, to be able to link signed documents somewhere into the Documents database, but I cannot figure how to do that.

I would appreciate any help.