Unused global option(s) [english]

Question

Whenever I compile my TeX file, I get the following warning

Unused global option(s) [english] 

and

Underfull \hbox(badness 10000) in paragraph at lines 27-28

Answer 1

Unused global option(s) [english] probably means you have done something like

\documentclass[english]{article}

and that the global option [english] isn't doing anything.

The underfull \hbox (badness 10000) warning is usually generated by abruptly ending a line of text using \\. To end a paragraph, you should use a blank line. There are probably lots of other ways to generate this warning, but without seeing an example code, this is the best guess I can make.

Answer 2

This really depends on the class you're using and/or your document preamble, but you're probably calling

\documentclass[...,english,...]{<class>}

If the (global) option english is not used by the <class> it is passed to and package you might load along the way. If TeX reaches \begin{document} without the english option being used, it'll issue a warning and reference all unused options.

Typically english is used with babel, so you can add

\usepackage{babel}

to your preamble for english to be properly used, or remove the english option altogether from loading the class.

Your second question is addressed here: What are underfull hboxes and vboxes and how can I get rid of them?

Answer 3

NB! Global options can also be case sensitive. Writing "a4paper" (correct) instead of "A4paper" (incorrect) removed the unused global options warning in my case.