This worked great! Just a small note you need to actually search (use the search bar to filter) “expand”, and “hide” if you want to change that too > Save.
Topic summary
Mobile checkout collapses the Order Summary by default, causing customers to miss fees and the discount code field. Merchants want it expanded by default.
Early workaround: change the checkout language (Settings > Checkout > Manage checkout language) to make the “Expand summary” prompt clearer. Helpful for copy, but does not auto‑expand.
Impacts reported: increased checkout drop‑offs, confusion around entering discount codes, and perception of hidden fees—especially on mobile and with older shoppers.
Tried workarounds:
- Third‑party app (DCart) to surface a discount field in the cart (conflicts with cart drawer).
- Switching to 1‑page checkout helped some.
- A custom script was shared, but at least one user said it didn’t work on mobile; details are unclear.
- Question raised about using a URL parameter (no answer).
Latest update: Official support now exists for Shopify Plus. In Settings > Checkout > Customize > Order summary, enable “Always show discount code field” to auto‑expand the summary on mobile. Limitation: works only on the 3‑page checkout layout; users ask how to enable it on 1‑page checkout.
Status: Partially resolved (Plus, 3‑page). Unresolved for non‑Plus and for 1‑page checkout; discussion ongoing.