By Capitalization variants I mean - All caps, Camel casing, All small.
I want to understand which of these variants should be used in content-elements like Heading, Sub-heading, Navigational-Menu-item-names, Button label, Modal boxes' title, Dialog boxes title, Dialog box text, Dialog box options, etc.
If there are standard rules, for this? Do these rules depend on the font I use, on the font size I am using? Do these rules vary for device - desktop-websites, for mobile-sites/apps? Can I use the same standardizations for iOS & Android devices/OSs? But if there are no standard rules, then how do I standardize the same for my web-product?