People are often confused about the correct spelling of the past tense of the verb ‘to spell’. As with so many of these issues, the problem seems to be one of a clash between the UK, the US, and the rest of the English-writing world, and a question of style.
One of the issues that often comes up in people’s work is their use of initial capitals, mostly within headings. This depends on whether your document style is for title case or sentence case. Sentence case Sentence case means capitalising something as if it were an ordinary sentence. This means the first letter is a capital letter, as well as proper nouns, like people’s names, countries, and official job titles. Otherwise, the first letter of a word is in lower case.