> ## Documentation Index
> Fetch the complete documentation index at: https://q.odontox.io/llms.txt
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# Finance Letterhead — Safer Margins, Crisp Signatures

> Dial in the margins so prescriptions and invoices land cleanly in your pre-printed letterhead, with signatures that print crisp black on every PDF.

Dial in the margins so prescriptions and invoices land cleanly in your pre-printed letterhead's writable zone, with signatures that come out crisp black instead of grey ghosts. We widened the allowed range and pushed the default into a zone that fits most letterhead designs on the first try.

## What's new

* **Default safe-zone margins are 60mm top and 32mm bottom.** Most pre-printed letterheads we have measured fit cleanly inside those numbers without any adjustment.
* **Allowed range widened.** Top margin accepts 5–120mm. Bottom margin accepts 5–100mm. Clinics with very tall letterhead designs can now dial in the exact value they need.
* **Signatures print opaque black on every PDF.** The signature compositor re-tints every stroke pixel to pure black at full opacity before embedding, so a faint pencil signature comes out as a sharp black one. Same logic across prescriptions, invoices, receipts and quotations.

## Need help?

If anything is unclear, write to [support@odontox.io](mailto:support@odontox.io) or open a ticket from **Settings → Support**.