How to Change and Customize Your WordPress Theme

September 11, 2025
How to Change and Customize Your WordPress Theme

Your WordPress theme controls the design and layout of your website. Changing or customizing your theme allows you to give your site a unique look that matches your brand or purpose. WordPress makes it easy to switch themes and adjust them without coding. Here’s how.

Step 1: Access the Theme Settings

  1. Log in to your WordPress dashboard at https://yourdomain.com/wp-admin.
  2. Go to Appearance → Themes.
  3. Here you can see your active theme and available installed themes.

Step 2: Install a New Theme

You can choose from thousands of free themes in the WordPress theme directory, or upload a premium theme.

  • Click Add New at the top of the Themes page.
  • Browse or search for a theme, then click Install.
  • After installation, click Activate to make it live.
  • If you purchased a premium theme, click Upload Theme and upload the ZIP file, then activate it.

Step 3: Customize Your Theme

Once a theme is active, you can customize it to fit your style.

Option A: WordPress Customizer (Classic Themes)

  1. Go to Appearance → Customize.
  2. Use the live preview panel to change colors, fonts, menus, widgets, homepage settings, and more.
  3. Click Publish to save your changes.

Option B: Site Editor (Block Themes)

  1. If your theme is a block-based (FSE) theme, go to Appearance → Editor.
  2. Edit templates and template parts (header, footer, blog, single post).
  3. Add or remove blocks, adjust layouts, and apply global styles via Styles.

Step 4: Add Widgets and Menus

  • Go to Appearance → Widgets to add widgets to sidebars or footers (classic themes).
  • Go to Appearance → Menus (or Navigation block in block themes) to organize your site’s navigation.

Step 5: Customize with CSS (Optional)

For more advanced tweaks, add custom CSS:

  1. Go to Appearance → Customize → Additional CSS.
  2. Add your CSS rules, for example:
/* Change link color */
a {
  color: #0073aa;
}
a:hover {
  color: #005177;
}

Step 6: Use a Child Theme (For Advanced Customization)

If you plan to edit theme files, create a child theme to preserve your changes when the parent theme updates.

  • A child theme contains a style.css and optionally a functions.php.
  • Activate the child theme and make edits there.

Best Practices

  • Preview before activating: Use the live preview option to test themes without affecting your site.
  • Back up your site: Always back up before switching to a new theme.
  • Check responsiveness: Ensure the theme looks good on mobile devices.

Summary

  1. Go to Appearance → Themes to browse, install, and activate a theme.
  2. Customize it using the Customizer (classic themes) or Site Editor (block themes).
  3. Set up menus and widgets to organize navigation and layout.
  4. Use Additional CSS for small tweaks, or a child theme for deeper customization.

By changing and customizing your WordPress theme, you can create a site that not only looks great but also matches your goals and branding.

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Written by

satoshi

I’ve been building and customizing WordPress themes for over 10 years. In my free time, you’ll probably find me enjoying a good football match.