Yes. A page Atlas publishes becomes a normal template in your Shopify theme, so you can open it in the theme editor, add sections, and edit the code the same way you would any other page. The one rule to understand: republishing from Atlas replaces the page, including anything you changed by hand.
In this article:
What you can do
Once published, an Atlas page is a theme template. In the Shopify theme editor you can:
Add your theme's own sections above or below the Atlas content
Add app blocks from other apps
Edit the template's code, if you are comfortable doing so
Add custom CSS through your theme's settings or a custom Liquid section
This is deliberate. Atlas builds pages from real sections and blocks rather than a closed embed, which is what makes them editable afterwards.
The republishing rule
⚠️ Selecting Publish again on a page in Atlas rewrites that page in your theme. Anything you edited by hand in the Shopify theme editor is replaced. There is no merge and no warning listing what will be lost.
Publishing replaces the current home page and product pages with the same products on the selected theme.
This is not a reason to avoid custom code. It is a reason to decide where each change belongs.
Deciding where to make a change
Change | Make it in |
Copy, headings, benefits, testimonials | Atlas editor |
Colours, palette, section visibility | Atlas editor |
Adding or reordering blocks within Atlas sections | Atlas editor |
Adding a section from your theme | Shopify theme editor |
Adding another app's block | Shopify theme editor |
Custom CSS or scripts | Shopify theme editor, or theme settings |
💡 Keep everything Atlas can do in Atlas. Then a republish only ever costs you the theme-editor changes, and you know exactly what those are. Mixing copy edits across both places is what makes republishing painful.
Adding tracking and third-party scripts
Do not add these to individual Atlas pages. Add them once, store-wide, so they survive any republish:
Analytics and pixels: use Shopify's Customer events settings
App scripts: use each app's own app embed in Theme settings
Site-wide CSS or JavaScript: your theme's settings or
theme.liquid
Anything added at store level applies to Atlas pages automatically and is never touched by republishing.
What not to touch
The Atlas Page Builder app embed. Turning it off breaks every Atlas page on the theme.
The Atlas sections themselves, if you plan to keep editing that page in Atlas. Restructuring them by hand makes a future republish more disruptive.
The Atlas Bundler block's position, unless you mean to move it. It needs to stay on the product template for bundles to show.
If your changes disappeared
Almost certainly a republish. Either you selected Publish again, or someone else did.
There is no version history for theme edits inside Atlas. Shopify does keep some theme version history under Online Store, then Themes, then the theme's version history. Check there if you lost substantial work.
To avoid it recurring: keep custom code in a snippet or a section you add separately, rather than editing the Atlas-generated template directly. A separate section survives a republish; an edit inside the generated template does not.