Overview
Each form has its own settings. Open the form and click the Settings tab. The sections you see depend on the kind of form.
Storefront forms
General
Rename the form, and turn on Mark required fields to add an asterisk (*) after every required field's label.
Form style
Choose Light, Dark or Inherit from theme, which matches your theme's styles as closely as it can.
Account options
Choose Default, which creates the customer in Shopify straight away, or Require account approval. See Account options.
Redirect options
Choose what customers see after they submit. On the Redirect tab, send them to a specific URL or back to the previous page. On the Submission success message tab, show a success step that you edit in the form editor. You can also turn Display cancel button on or off and choose where the button goes.
Language
Change the text on the form's buttons and messages, like Create account, Update account and the error messages. See Form errors shown to customers.
Advanced
These settings are for developers.
Whitelisted tags
The tags customers can add or remove through this form, separated by commas. Use * as a wildcard, like vip-*. Every other tag stays as it is. Tags from fields with Tag customer with selected value and from tag rules are allowed automatically. See Customer tags.
Custom CSS
Your own CSS, added to the page wherever this form shows. It isn't limited to the form, so write selectors that only target it. See Custom form styling.
Read from guest data store
Fills in the form with answers a guest saved earlier in their browser's localStorage.
Submission method
Register sends submissions to Customer Fields, and is the default. Save to guest data store keeps a guest's answers in their browser's localStorage to send later. Signed-in customers' forms submit normally either way. See Guest data.
Backup
Download a copy of the entire form for safekeeping, or for importing into another Shopify store that has Customer Fields installed.
Account/Checkout forms
These forms show in the customer's account or on the Thank you page, and have three sections.
General: the name, and Mark required fields.
Language: the text on the buttons and messages, like Save.
Post-checkout: Hide if previously submitted, which stops a customer seeing the form on the Thank you page after they've filled it in. See Add a post-purchase survey or form to the Thank you page.
Legacy customer accounts
Storefront forms on Legacy customer accounts have two more settings.
Display password reset link (General): a link under the form for signed-in customers that sends Shopify's password reset email.
Require email verification (Account options): customers confirm their email first. Redirects aren't available while it's on, so customers see a "Verify email" message instead.