> ## Documentation Index
> Fetch the complete documentation index at: https://docs.orbid.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# What is a cellmap?

> A cellmap maps tender form cells to requirement rows so fill hits the correct Excel locations.

# What is a cellmap?

A **cellmap** is the structural map from tender spreadsheet cells (and related form regions) to requirement semantics used by scan/fill. Without a sound cellmap, Excel fill writes to the wrong places.

## Why it matters

Medical tenders often use multi-sheet Excel response forms. Orbid’s [`run_fill_excel`](/guides/skills/fill) depends on knowing which cells are bidder response vs instructions vs commercial schedules.

## Everyday

After scan, you do not “draw” a cellmap manually in docs terms—you ensure the tender was scanned and that fill runs only after match.

## Professional notes

* **Multi-sheet forms** — Confirm the response sheet was identified
* **Merged cells / labels** — Expect residuals where structure is ambiguous
* **Re-upload** — Re-scan; do not reuse stale maps

## Related

* [Fill skill](/guides/skills/fill) · [Scan](/guides/skills/scan) · [Residual](/concepts/residual)