Help & troubleshooting
The field button says "click in your document first"
The tool inserts fields wherever your cursor is. Click once inside the body of your letter to place the cursor, then click the field name in the sidebar.
A field came out blank
Blank values mean that cell is empty in your spreadsheet for that row. Check the column
in your Sheet. Field names are matched loosely — {{First Name}},
{{first name}}, and {{first_name}} all match a
First Name column.
A tag stayed in the document as {{Something}}
That tag doesn't match any column in your selected tab. Fix the spelling in your letter, or add the matching column to your spreadsheet, then run again.
"Could not open that spreadsheet"
You may have lost access to the Sheet, or it was deleted or moved. Click Change spreadsheet… and pick it again.
Formatting looks off in combined mode
Combined documents copy each row's content with a page break between rows. Very complex layouts (some images, columns, or section breaks) may not copy perfectly — use one document per row if you need exact formatting.
How many rows can I merge at once?
Most letter runs complete in a single pass. Very large runs can take a while; turn on Email me when the merge finishes so you don't have to watch it.
Does my data leave Google?
No. Everything runs inside your own Google account. See the privacy policy.