How to hide Drupal comment Subject line and help text

There are several ways of hiding Input format options for Drupal comments, the simplest (but the wrongest) way is by just hiding area with CSS (display:none), second -  you can use the hook_form_alter function to make changes to a form before it is rendered (See article: How to Theme the Comment Form in Drupal 7)  and third one is by using a simple module with simple name: Simplify.

In this article you will find how to hide help area for Drupal comments using module Simplify.

I must admit, I have always avoided using default Drupal comment system (which ships out of box for any Drupal site, you just need to enable it from modules page) - I don't now actually why I have been avoiding them, and opted to use third party comment providers (Disqus, for example)

I was working on non-profit Drupal site (voluntary) and wanted to build it without involving any third party plugins, the site involves blog posts and for a comment system I opted in for default Drupal comment system. Just shortly after enabling them - I really didn't like them, because of - confusing Subject field and filter tips area.

Default Drupal Comment form

Default Drupal Comment form

It was easy to disable Subject field - just visit your content type, and under comment settings uncheck - Allow comment title

For disabling help area under Drupal comments - it was tempting to use CSS trick - display:none, to get fast results, but as you already know - that's a bad practice, which might end you penalized by Google (Google don't love hidden texts). I almost started with hook_form_alter, but that involved a little research and testing, luckily I found Simplify module and was able to get what I was looking for.

Simplify allows particular fields to be hidden from the user interface. This helps to de-clutter forms and present a more user-friendly experience to content editors.

After I installed and enabled Simplify module, from modules configuration page (admin/config/user-interface/simplify) , under comment settings I checked next to Hide - Text format selection, and I was done. Took me less than five minutes, here is the final result of Drupal comment form:

Formatted Drupal comment form

Formatted Drupal comment form

Hope it helps!