Auto Number generates a unique, incrementing number with each new document merge. This is useful for invoices, event tickets, receipts, or any document that requires a sequential identifier.
Enabling Auto Number
Both of the following steps are required. Auto Number will not work unless you complete both.
Step 1: Configure the File Name
1. Open your document and navigate to the Settings tab.
2. In the File Name section, select _auto_number from the dropdown menu. This inserts the auto-incremented number into your output file name.
Example
Step 2: Enable Auto Number in Advanced Settings (right sidebar)
1. On the right sidebar, click + Advanced Settings to expand the advanced options panel.
2. Check the Auto Number checkbox.
3. Enter your desired starting number in the field that appears below the checkbox. Each subsequent merge will increment from this value.
Click Save Settings to apply.
Using Auto Number in Your Document
Insert the variable {$_auto_number} anywhere in your document template where you want the number to appear.
- Build Your Own builder: Use {$_auto_number} directly in the template body.
- If you're using a Fillable PDF: Check Use Field Map for custom integrations (also under Advanced Settings), then assign the _auto_number variable to one of your PDF fields via the Field Map.