[A] The upload document option document will not be visible in the transaction timeline.
[B] Alternatively, you can use "Post Comment" to upload documents.
[C] To upload documents, go to the transaction for which the document is to be uploaded.
[D] Click on "Post Comment".
[E} In the box, you can add the document by dragging it. Or you can click the box to upload the document. Then click on "Submit". The document is now uploaded.