< KDE Visual Design Group‎ | HIG
Revision as of 14:04, 14 February 2017 by Htietze (talk | contribs) (Deleted ", but From or Under" from the five letters rules because source of that couldn't be found; Content updated according http://grammar.yourdictionary.com/capitalization/rules-for-capitalization-in-titles.html)

KDE Visual Design Group/HIG/Capitalization


Capitalization is a feature of case-sensitive languages to foster relevance. In terms of software it draws attention to words with capital letters. For a consistent look and feel of the software it is important to implement capitalization consistently. On the other hand, capitalization slows down translation and increases the risk of inconsistent terminology.


There are two types of capitalization, title capitalization and sentence style capitalization:

Title Capitalization

Title capitalization is when every word in a sentence, statement, phrase, or label are capitalized except for certain words. Words with less than five letters are generally lowercase in titles, unless they are the first or last words in a title.

Do not capitalize:

  • Articles: a, an, the
  • Coordinating Conjunctions: and, but, or, for, nor, etc.
  • Prepositions (fewer than five letters): on, at, to, from, by, etc.

Always capitalize

  • Nouns (man, bus, book)
  • Adjectives (angry, lovely, small)
  • Verbs (run, eat, sleep)
  • Adverbs (slowly, quickly, quietly)
  • Pronouns (he, she, it)
  • Subordinating conjunctions (as, because, that)

Use title capitalization in the following cases:

  • Window and dialog box titles
  • Group box / group line labels
  • Button labels
  • Tab labels
  • Listview column headers
  • Menu titles / menu items
  • Derivatives of KCommand
  • Combobox items
  • Listbox items
  • Tree list items
  • Other heading/title text

Sentence Style Capitalization

Sentence style capitalization is when the first letter of the sentence, statement, phrase, or label is capitalized and all other words are lower case. The only exception to this is proper nouns which are always capitalized.

Use sentence style capitalization in the following cases:

  • Edit box labels
  • List box labels
  • Combo box labels
  • Spin box labels
  • Check box labels
  • Option button labels
  • Slider labels
  • Pop-up hint text
  • Dialog header/description
  • Other non heading/title text

Acronyms/Initialisms, Internet

  • Words such as URL, JPEG, or LDAP should be written in capital letters
  • Internet (if referring to the Internet) takes a capital I.

This page was last edited on 5 February 2019, at 16:42. Content is available under Creative Commons License SA 4.0 unless otherwise noted.