No Modification: Makes no change to the title. This is for when you want to use other options such as remove excessive punctuation.
Sentence Case: Lowers all characters in the string and makes the first letter of the first Word uppercase. example: "The quick brown fox jumps over the lazy dog",
Upper Case: Makes all letters uppercase in the sentence. Example: "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG",
Lower Case: Makes all letters in the sentence lowercase: Example: "the quick brown fox jumps over the lazy dog",
Title Case: Makes the first letter of everyone word uppercase while lowering the rest. "The Quick Brown Fox Jumps Over The Lazy Dog".
I hope that helps. Sorry for taking so long, I never got any notification of replies to this post.