Space’s Fixed buy buttons block adds a sticky add-to-cart bar on product pages. The theme editor exposes colors, position, and scroll behavior. Changes to button labels, price in the button, or mobile layout beyond those settings require editing the product__stickyadd.liquid snippet.
Add the block on Product main (or Featured product):
Customize > open a product template > select the product section.
Add block > Fixed buy buttons.
Configure:
Color scheme, Color border, Color button
Horizontal position — Left, Right, Center, or Full
Show after scrolling — bar appears only after scrolling past the main add-to-cart form
Optional text — rich text above the button (desktop)
Only one Fixed buy buttons block is allowed per product section.
What requires code changes
The sticky bar markup lives in:
text
1
snippets/product__stickyadd.liquid
Common merchant requests that need snippet or developer work:
Request
Editor support
Code location
Change add-to-cart button text globally
Partial — use product metafield custom.button_text for per-product text
Snippet button labels
Show price inside the sticky button
Not in editor
product__stickyadd.liquid
Full-width mobile layout tweaks
Full position only in editor
Snippet CSS classes
Replace variant dropdown with swatches
Not in editor
Snippet + product options blocks
Editing product__stickyadd.liquid counts as modified theme code. Keep a backup duplicate and review Support policy for modified theme code before requesting theme support on customized files.
Locate the snippet
Go to Online Store > Themes.
On your theme, open … > Edit code.
Open Snippets > product__stickyadd.liquid.
The snippet is rendered from product__main.liquid when a stickyadd block is present:
liquid
1
{% render 'product__stickyadd', block: block %}
Safe customization practices
Duplicate the theme before editing snippets.
Change one element at a time (button text, layout class, optional price output).
Test on mobile and desktop — position classes differ by breakpoint (md: prefixes).
Example: show price next to the button (developer)
A developer can output the selected variant price inside the sticky bar using existing Alpine.js state (current_variant_id) and Paper/Space price snippets. Exact Liquid depends on your Space version—compare with product__add.liquid for patterns used on the main product form.
We do not publish copy-paste code here because Space updates can change variable names. Hire a Shopify developer if you are not comfortable editing Liquid.
Sticky bar and other fixed elements
Fixed elements (sticky header, cookie banners, chat widgets) can overlap the buy bar. If content is obscured, adjust Horizontal position, disable Show after scrolling temporarily to debug, or reduce third-party widget z-index via app settings.
