Each module you create on your site automatically receives a unique ID number which identifies it. At some point of working with your theme, you might find yourself wanting to know the ID of a specific module, so here’s how to do that.

But first, when is it useful?

• If you want to modify the style of something through CSS but only for that specific module.
• If you want a button on your site to link to a specific section on a page, i.e. to a specific module.
• If you want an item on your navigation menu to link to a specific section on a page (if you’re building a one-page site, for example).

There are many ways to find a module’s ID. We’ll take a look at two different and really simple ways:

I. On your WordPress Dashboard

1. Go to the Modules list in your dashboard.
2. Edit the module you want to work with.
3. Look at the URL in your browser’s address bar and find the section that looks like this: “post=[ID-NUMBER]”.
4. Use that number to form your ID selector like this: #post-[ID-NUMBER]
   e.g. #post-2752

II. From the inspector in your browser

1. Navigate to the page where you added the module you want to work with.
2. Right-click anywhere on the module and select Inspect.
3. Search in the markup for the < section > HTML tag that starts the module’s markup.
4. You’ll see the module has an ID that looks like this: id=”post-[ID-NUMBER]”. Use that to form your CSS ID selector like this: #post-[ID-NUMBER]
   e.g. #post-2634

Remember the ID number is not enough to use it on your CSS. The whole CSS selector will look like this:
#post-2752