The Insertion Point.
The footnote number is usually inserted as a superscript number at the end of the sentence or phrase where the footnote reference is located. It appears after any punctuation marks.
Addendum is a noun. It refers to an additional item or information added at the end of a document.
Postscript is a noun. It refers to an additional piece of writing added after the main body of a letter or document.
A suffix that can be added to a number is "-th" to indicate ordinal position, such as first, second, third.
A prefix can indicate location, time, or number depending on the context. It is added to the beginning of a word to modify its meaning or create a new word.
A paragraph added to a letter after it is concluded and signed by the writer; an addition made to a book or composition after the main body of the work has been finished, containing something omitted, or something new occurring to the writer.
A footnote.
By inserting an A, paper becomes pauper.
Addendum
You haven't added any detail but generally the answer is No.
Photoshop.
The document is a JPEG image.
Bill of rights
yes
There are times when even the most well thought out document needs something added to it update the information. If you need to amend a document for any reason add the amendments at the end of the document.
There are a few different ways in which a document may be amended or changed. Rules could be added for example.
the Bill of Rights
the Bill of Rights