How to customize a WordPress website’s design

Create a backup or work on a staging site before changing templates, theme settings or CSS. Design changes can affect every page that uses the same header, footer or template.

Write down the current theme name and take screenshots of important pages. If a change causes a layout problem, you can restore the previous version instead of trying to reconstruct it.

Go to Appearance and look for Editor. If it is available, your active theme is a block theme and you can edit the full site, including templates, headers and footers, with blocks. The Site Editor is available only with a block theme.

If you see Customize instead, use the Customizer. Its panels depend on the theme, but commonly include site identity, colours, menus, widgets, homepage settings and Additional CSS.

With a block theme, open Appearance > Editor > Styles and set the site-wide colour palette, typography and layout. You can also adjust the appearance of specific block types, such as headings, buttons or images. Save carefully because global style changes affect many pages at once.

With a classic theme, open Appearance > Customize, then change the available colour, font, background and layout controls. Use the device preview before publishing so a desktop change does not make the mobile layout unusable.

Use the Site Editor to open templates and template parts, then edit the header, navigation, content area, sidebar and footer with blocks. A header or footer change usually applies to every page using that template part, not only the page currently shown.

For a single page, edit the page itself with blocks such as Group, Columns, Cover, Image and Buttons. Use the List View to select nested blocks when spacing or alignment is difficult to control.

For a small visual adjustment, use Additional CSS in the Customizer, or the site-wide CSS area in the Site Editor where your theme provides it. For a block, you can add a class under its Advanced settings and target that class with CSS. WordPress also provides per-block CSS in the Styles interface for supported block themes.

Do not edit the parent theme’s files directly. Updates can overwrite those changes. If you need a stylesheet or template override, use a child theme and load its stylesheet using WordPress’s normal enqueue process.

If CSS appears to do nothing, check that the selector matches the front-end markup, clear browser and site caches, and inspect the element to see whether another rule has higher priority. A missing semicolon or a class added to the wrong block is a common cause.

Preview the homepage, a normal page, a blog post, an archive, the search results and the 404 page. Check the design at desktop, tablet and mobile widths, then test menus, buttons, forms and WooCommerce pages if the site sells products.

Look for text that wraps badly, buttons that are too small, low colour contrast, cropped images and excessive spacing. Publish or save only after checking the actual front end in a logged-out browser window.

If you want to create polished layouts quickly without building every section manually, consider Salient. It combines a visual builder with more than 250 demo layouts, so you can import a starting design and adjust its colours, typography, sections and responsive settings instead of assembling the entire site from basic blocks.

The manual WordPress route is enough for a small site or modest redesign. Salient is the faster option when you need a more elaborate visual system, multiple page layouts or a starting design that would take considerable time to build yourself.