Q: how do you decide whether to use uppercase or lowercase letters?
A: there are many ways, but here are some examples of where i would choose to use capital letters: If i'm starting a new sentence, and i need a little bit of extra conviction, i might use a capital letter to start. if i'm using chord symbols such as Bb. if i'm using acronyms, such as UNESCO. if i'm using the letter L and i feel that it won't be otherwise interpreted as L based on context. i might use them if i need emphasis or power, in the same way that the 'bold' style might be used, except capitals have the advantage of being available in places where bold is not. Or i might just use them for artistic embellishment. most other normal situations, i use lowercase, also known as the 'normal case'