\documentclass[letterpaper]{article} produces A4
106152
\documentclass[10pt, a4paper]{article} not working properly
47061
suppress page numbers in document's front matter
29967
Problem with long chapter title and arsclassica
88944
Documents with typical LaTeX errors
92767
Styles of the Lowercase "a"
58861
How to add a document class to TexStudio?
55870
koma-script/scrlayer-scrpage: How to get rid of the rulers at the page edge when enabling the draft class option?
11024
How to fix error: The markup in the document following the root element must be well-formed
55088
A3 pages within A4 doc
19873
Set version of a document
139433
Residue failed to reproduce this residue in a paper
119347
Equation number is not in same line in two-column document class
65117
How can I create documents in LaTeX using a calligraphic first letter for chapters?
134582
Recognize this letter
13435
here-document gives 'unexpected end of file' error
15402
Setting a document in MS Word-12pt (12bp)
142738
Problem with composite letters in section labels