> ## Documentation Index > Fetch the complete documentation index at: https://docs.shipweaver.app/llms.txt > Use this file to discover all available pages before exploring further. # Frequently asked questions > Answers about ShipWeaver rules, Preview mode, priority, templates, actions, and conditions. Common questions about customizing delivery options at Shopify checkout. > **What is ShipWeaver?** > > ShipWeaver is a Shopify app that lets you customize how shipping and delivery options appear during checkout. You can hide, rename, reorder, and sort shipping methods based on cart contents, customer location, product tags, and more. > **Does ShipWeaver change shipping rates?** > > No. ShipWeaver only changes how shipping options are *displayed* at checkout. It does not calculate rates, set prices, or integrate with carriers. Your existing shipping setup stays the same. > **Where do my changes appear?** > > Changes apply in the Shopify checkout when customers select a shipping method. They do not affect the Shopify admin, orders, or any other part of your store. > **What is Preview mode?** > > Preview rules apply only to testers, not regular customers. Configure your tester email in the app. Customers with that email or the `shipweaver` customer tag see Preview rules. Everyone else sees only Live rules. > > ![Preview testers modal explaining that regular customers never see Preview rules](https://mintcdn.com/shipweaver/Vd49SG8iKQVslbPn/images/preview-testers.png?fit=max\&auto=format\&n=Vd49SG8iKQVslbPn\&q=85\&s=d698d476f90b19384cddb10e2f060ec3) > > Either tester email or the shipweaver customer tag is enough. > **How do I test rules before going live?** > > Create a rule and set its status to Preview. Add your email in tester configuration, or tag a test customer with `shipweaver`. Check out as that tester. When you are satisfied, set the rule to Live. > **How does rule priority work?** > > Rules run in priority order. A lower number is higher priority. The first rule that matches a shipping option applies. If multiple rules affect the same option, the higher-priority rule wins. Reorder rules in the app to change priority. > **Why don't I see my changes in checkout?** > > Check that: > > 1. The rule is Live or Preview, not Off > 2. Conditions match the current checkout > 3. Rule priority is correct > 4. Rules have been synced > > For Preview rules, confirm you are checking out as a tester. > **How do I sync my rules to Shopify?** > > Rules sync when you save, activate, or bulk-update them. Saving or deploying triggers a sync. If checkout is stale, use Sync in the app. > **Can I use templates?** > > Yes. Choose a template such as free shipping over a threshold or hide Express for a PO Box, then customize it. You can also create rules from scratch. See [Templates](https://docs.shipweaver.app/templates.md). > **What is the difference between Standard and Cart and line attributes?** > > **Standard** gives you address, cart, product tags, collections, variant SKU or title, and delivery option data. **Cart and line attributes** gives you cart attributes and line item attributes. Pick the type that matches your conditions. > **Can I duplicate a rule?** > > Yes. Use the duplicate action on any rule. The copy starts as Inactive. Edit it and activate when ready. > **Does ShipWeaver work with Sidekick?** > > Yes. Ask Sidekick in Shopify Admin about checkout options. It can read ShipWeaver rules and your shipping profiles. > > ![Sidekick explaining a live sort rule for US carts with fewer than 4 items](https://mintcdn.com/shipweaver/Vd49SG8iKQVslbPn/images/sidekick-overview.png?fit=max\&auto=format\&n=Vd49SG8iKQVslbPn\&q=85\&s=43b798d747e94713bf8aef0a96f2e163) > > Sidekick summarizing live and inactive ShipWeaver rules. > **Does it work with Shop Pay?** > > Yes. ShipWeaver uses Shopify delivery customizations, which run server-side during checkout. Shop Pay and other accelerated checkouts see the same filtered, renamed, and ordered methods. > **Does it work with multiple carrier apps?** > > Yes. That is a common reason duplicates appear. Shopify Shipping, flat rates, and carrier-calculated rates can all show at once. ShipWeaver can hide extras, keep the cheapest Ground option, or rename titles so they match. > **What is the difference between sort and reorder?** > > **Sort** orders every method by price or name. **Reorder** pins specific methods (Free Shipping, Express) to the top or bottom. Use sort for a consistent list. Use reorder when one named method should always appear first. > **What happens if a rule hides every shipping method?** > > Customers cannot complete checkout. Always leave at least one visible option. Test hide rules in [Preview](https://docs.shipweaver.app/preview.md) with a real cart and destination before setting them Live. > **Can I schedule when a rule is active?** > > Yes. Some templates include a date range, for example a holiday Express cutoff. The rule only applies during that window. > **What happens to my data if I uninstall?** > > All shop data is deleted when you uninstall, or when Shopify sends a shop/redact request. See the [Privacy Policy](https://docs.shipweaver.app/privacy). For action and condition catalogs, see [Actions](https://docs.shipweaver.app/actions.md) and [Conditions](https://docs.shipweaver.app/conditions.md). This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.