Question

when you're writing a title, how do you know what words to capitalize the first letter?

Answer 1

the important words and not conjunctions or "the" unless it's the first word

Answer 2

I think it really depends on what format you are using APA, MLA, etc.

As a general rule, the first word is ALWAYS capitalized and all of the important words are capitalized...words such as or, of, in, and stay lower-cased.

Answer 3

The first word and all the other words after it besides the, on, and, and other commonly used words. For example:
"The City Charlotte is on the Map!"