Titles
In English, titles are typically either Title Cased or Sentence cased (for the distinction, see http://blog.apastyle.org/apastyle/2012/03/title-case-and-sentence-case-capitalization-in-apa-style.html ). Because citation styles differ in their casing requirements, and because automatic conversion of sentence case to title case is much more accurate than the other way around, we recommend that you store titles in your Zotero library in sentence case. Zotero can then reliably convert titles to Title Case in rendered bibliographies when the chosen citation style calls for it.
To help with changing the case of titles, the title fields (e.g., “Title”, “Publication”, “Series Title”, “Short Title” for the “Journal Article” item type) can be right-clicked. This shows the “Transform Text” menu, with options to convert the title to either “Title Case” or “Sentence case”. Zotero does not recognize proper nouns, and transformed titles should always be checked for capitalization errors.