I designed the UI for CoverSutra according Apple's Human Interface Guideline. This guideline recommends using two capitalization forms: Title Style and Sentence Style.
Labels that are not full sentences should use the title style which means that you nearly capitalize every word.
Text on controls like checkboxes should use the sentence style which means that the first word is capitalized, and the rest of the words are lowercase, unless they are proper nouns or proper adjectives. You can read more about this here.
The two "Album Cover" and "Desktop Cover" options are capitalized because both describe a noun or single concept. It's not a desktop and a cover or a cover on the desktop, it's a "Desktop Cover" - one thing. This is a bit like the distinction between "sitting in the front row" and "using Front Row" ... get it?
by Sophia — Jun 08
Labels that are not full sentences should use the title style which means that you nearly capitalize every word.
Text on controls like checkboxes should use the sentence style which means that the first word is capitalized, and the rest of the words are lowercase, unless they are proper nouns or proper adjectives. You can read more about this here.
The two "Album Cover" and "Desktop Cover" options are capitalized because both describe a noun or single concept. It's not a desktop and a cover or a cover on the desktop, it's a "Desktop Cover" - one thing. This is a bit like the distinction between "sitting in the front row" and "using Front Row" ... get it?