Check for parent theme edits
Direct edits inside the parent theme can be overwritten. Compare the installed files with a clean copy and move durable customizations into a child theme or site-specific plugin where appropriate.
Test templates and bundled plugins
On staging, test headers, footers, page templates, menus, widgets and responsive layouts. Also check any companion or bundled plugins required by the theme.
Keep a known working version
Retain the previous theme ZIP and a full backup until the live site has passed visual and functional checks. Do not depend on appearance alone when the theme also controls custom post types or builders.
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FAQ
Will updating a parent theme remove child theme changes?
A correctly configured child theme should remain separate, but changed hooks or templates in the parent can still affect its behavior. Test before production deployment.
Can I upload a theme ZIP over the existing theme?
Modern WordPress versions can replace an existing theme from the upload screen. Use the exact product package and keep a backup in case rollback is needed.
Do demo imports come with every theme file?
Not always. Demo content, cloud libraries and external assets can be separate services or packages, so check the product notes first.