Sign a PDF while retaining the original

Sign the intended document version and preserve a clear path back to the original.

Open the PDF and inspect its filename, version and relevant terms. Compare a revision before signing if needed.
Open Sign and place the intended signature on the correct page. Use a fictional scribble for a demo.
Inspect position and scale, then save the signed version through the app workflow.
Reopen the result and find the original in the document/version context. Share only the intended signed output.