By default, the article class in LaTeX does not encourage users to write an appendix in an article. But users can still claim an appendix environment by typing:
This will reset the counters for the section and subsection. However, (1) we have to manually type "Appendix" or "Appendices" for the section title; and (2) the counters for tables and figures still follow the numbering in the main text.
For the first point, there is the "appendix" package can deal with this.
# in the preamble
# where you start your appendix
But this will give you an awkward large font for the section title for "Appendices." And the counter for tables and figures still following the main text counter.
The flexibility of TeX language allows us to write code to deal with aforementioned point 1 and point 2.
So now, put \appendix right before you write your appendix.
1 hour ago