“ The most basic wiki feature is the 'edit' tab. With a few exceptions, you can edit every page on Wikisource. By the nature of Wikisource, original texts should not be changed, except for correcting transcription errors. However, you are encouraged to help in the proofreading process and to add new primary source texts. The Sandbox exists solely for tests, so feel free to use it to experiment.
Editing a file on Wikisource showing the text and original side by side Basic editing When you click edit at the top of a page, you'll find yourself in the 'edit view'. ”

“ They introduce a third notation used in Wikitext, that of the underlying html used for web pages, which has been extended for the purpose. These use a pair of matching brackets, in this case and to enclose the footnote and an unpaired version to indicate where any accumulated references are to be printed. ”

“ Meta:Help:Link and Style Guide: links
It is possible to create links to a page on Wikisource, on another wiki, or on the Internet.
Wikilinks: [ [The Tragedy of Julius Caesar] ] displays an internal link to the Wikisource page The Tragedy of Julius Caesar by using double square brackets. You can also create a piped link, which displays text that differs from the target: [ [The Tragedy of Julius Caesar|Julius Caesar] ] displays as Julius Caesar. Author links: A link to an author uses a prefix for that Wikisource namespace, as in Author:Gaius Julius Caesar. ”