# Template Library — PostFrame — EternalEngine

Pre-built templates for invoices, welcome emails, password resets, and more. Start from a professional design and customize to match your brand.

[Back to Templates](https://eternalengineos.io/features/postframe/templates/)

Template Engine

# Template Library

Eight starting points in five categories — welcome, newsletter, promotion, product announcement, receipt, invoice, appointment reminder and win-back — each opens in the editor ready to reword and rebrand.

[Start free](https://app.eternalengineos.io/signup?plan=free&interval=annual)[Template engine overview](https://eternalengineos.io/features/postframe/templates/)

## Start Fast, Customize Everything

Professional starting points

Pre-designed templates for the most common transactional email types

Brand customization

Change colors, fonts, logos, and layout to match your brand in minutes

Five categories

Onboarding, Marketing, Transactional, Appointments and Billing

Duplicate

Every template has a Duplicate action that creates a copy in your workspace to edit freely

Available Templates

Welcome

Onboarding — greet a new customer and point them at their first step

Receipt and Invoice

Billing — a payment confirmation, and an invoice with a due date and pay button

Newsletter, Promotion, Product announcement, We miss you

Marketing — a monthly update, a single offer, a release note, a win-back nudge

Appointment reminder

Appointments — remind a customer about tomorrow with the details they need

## Keep exploring PostFrame

[### Handlebars syntax Placeholders, conditionals, loops and helpers. Open Handlebars syntax →](https://eternalengineos.io/features/postframe/templates/handlebars-syntax/)[### Live preview Rendered preview as you type. Open Live preview →](https://eternalengineos.io/features/postframe/templates/live-preview/)[### Version history Every save bumps the version number. Open Version history →](https://eternalengineos.io/features/postframe/templates/version-history/)

Questions

## Common questions, straight answers.

Which templates are in the library?

Welcome, Newsletter, Promotion, Product announcement, Receipt, Invoice, Appointment reminder and We miss you — eight templates across Onboarding, Marketing, Transactional, Appointments and Billing.

Can I change a library template?

Yes. Open it in the editor, change any block or the HTML, and save — it is your copy in your workspace. Duplicate it first if you want to keep the original untouched.

Do library templates use Handlebars variables?

Yes. They carry {{placeholders}} for names, amounts and dates that you fill from template_variables on each send.

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