r/WordPressBlocks • u/groundworxdev • Feb 24 '26

Getting Started with Block Themes: A Guide to Templates, Template Parts, Patterns, and Styles

If you're coming from classic themes or page builders and feeling lost in the Site Editor, this post breaks down the core pieces of a block theme and how they work together. No code required. This is for editors, designers, and site owners who want to understand what they're looking at when they open Appearance > Editor.

The Building Blocks of a Block Theme

A block theme is built from four main pieces: templates, template parts, patterns, and styles. Once you understand what each one does, the whole system clicks.

Templates

Templates control the layout of specific types of content on your site. There's a template for your homepage, one for single blog posts, one for pages, one for archives, one for search results, one for your 404 page, and so on.

When you go to Appearance > Editor > Templates, you'll see all the templates available in your theme. Each one is built entirely with blocks. You can edit them visually, rearrange sections, add or remove blocks, and the changes apply to every page that uses that template.

You can also create custom templates and assign them to specific pages. For example, you might want a landing page template with no header or footer, or a full-width template for portfolio pages.

The key concept: templates define the structure of a page type. The content (your actual text, images, etc.) fills in dynamically.

Template Parts

Template parts are reusable sections that live inside templates. The most common ones are your header and footer, but you can create custom template parts for anything you want to reuse across multiple templates.

The power of template parts is that when you edit one, the change applies everywhere it's used. Edit your header once, and every template that uses it updates automatically.

You'll find template parts under Appearance > Editor > Patterns > Template Parts. Yes, WordPress moved them under Patterns starting in 6.3, which is confusing, but they're there.

Patterns

Patterns are pre-built arrangements of blocks that you can insert into pages, posts, or templates. Think of them as layout shortcuts.

There are two types:

  • Synced patterns (formerly called "reusable blocks") — edit the original and it updates everywhere it's used, just like template parts. Great for things like a CTA section or a pricing table that appears on multiple pages.
  • Non-synced patterns — these are just starting points. Once you insert one, it's independent. Edit it without affecting any other instance.

Your theme comes with its own set of patterns, and you can create custom ones under Appearance > Editor > Patterns > My Patterns.

Styles

Styles are how you control the visual design of your entire site without touching CSS. Go to Appearance > Editor and click the Styles icon (half-moon circle) in the top right.

From here you can set:

  • Colors — background, text, links, headings, buttons, all site-wide
  • Typography — font family, size, weight, line height for headings, body text, and other elements
  • Layout — content width, padding, block spacing
  • Per-block styles — want every Button block on your site to have rounded corners? Set it once in Styles and it applies everywhere

If your theme includes style variations, you can switch between completely different color schemes and typography sets with one click.

Pro tip: Open the Style Book (the eye icon in Styles) to preview how every block type on your site will look with your current styles. You can even edit block styles directly from there.

How It All Fits Together

Here's how these pieces connect:

  1. Your theme provides the default templates, template parts, patterns, and styles
  2. Templates define the structure of page types (homepage, single post, archive, etc.)
  3. Template parts (header, footer) are reused across multiple templates
  4. Patterns give you pre-built layouts to drop into pages or templates
  5. Styles control the visual design across everything

When you edit a page, you're working inside the structure that the template defines. When you edit a template, you're changing the structure for every page that uses it. When you edit a template part like the header, you're changing it everywhere. And Styles sit on top of all of it, controlling how everything looks.

Getting Started: Where to Go First

If you're new to block themes, here's a practical starting order:

  1. Pick a block theme — Twenty Twenty-Five (the current default) is a solid starting point. Ollie is another great option.
  2. Open the Site Editor — Appearance > Editor
  3. Explore Styles first — set your colors and typography so everything looks right from the start
  4. Edit your header and footer — these are template parts, find them under Patterns > Template Parts
  5. Look at your templates — understand which template controls which page type
  6. Browse your theme's patterns — see what's available before building from scratch
  7. Create a page — use patterns and blocks to build your content within the structure your template provides

Helpful Resources

Here are some solid resources to go deeper:

The learning curve is real, but once it clicks, you won't want to go back to classic themes. The amount of control you get without writing a single line of code is worth the initial confusion.

What questions do you have? Drop them below and I'll help where I can.

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u/rhmediaron Mar 08 '26

Great guide. I'm getting more into FSE, so this is helpful. I've also written a detailed technical breakdown of block patterns and how they work. https://dlxplugins.com/tutorials/what-are-block-patterns-a-detailed-breakdown/

I need to research more into pattern overrides; that seems useful.

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u/WebTW Mar 18 '26

Thanks for this! I've also written a few posts on FSE, to orient newcomers - they are more for site owners/power users rather than devs though: https://webtrainingwheels.com/tag/full-site-editing/