Disable wpautop:
This option will disable the wpautop feature in the editor.

Usage:
Please understand what disabling wpautop() means.

Firstly, you will need to manually add < p > and < br / > tags whenever you write a Post or Page from now on and, secondly and more importantly, you will need to go back into every existing Post and Page and manually add the < p > and < br / > tags.

This is because the < p > and < br / > tags in your Posts and Pages are NOT saved in the database. The < p > and < br / > tags you currently see, when viewing Posts and Pages in the browser, are added by the wpautop() function between database and browser.

If you enable this option, and are not pleased with the results; you can always come back and disable this feature, restoring your original content.