Splitting the Input

LaTeX2e help 1.6

## 2.19: Splitting the Input

A large document requires a lot of input. Rather than putting the whole input in a single large file, it's more efficient to split it into several smaller ones. Regardless of how many separate files you use, there is one that is the root file; it is the one whose name you type when you run LaTeX.

- \include Conditionally include a file.
- \includeonly Determine which files are included.
- \input Unconditionally include a file.