# Binder: Sheets

> Binding to a spreadsheet cell.

Glider documentation · Data · Web page: https://cgglider.com/docs/binder/sheets/

Sections of this page: [How binding works](https://cgglider.com/docs/binder.md) · [Sources](https://cgglider.com/docs/binder/sources.md) · [Live feeds](https://cgglider.com/docs/binder/feeds.md) · [Sheets](https://cgglider.com/docs/binder/sheets.md) · [Action binding](https://cgglider.com/docs/binder/actions.md) · [Troubleshooting](https://cgglider.com/docs/binder/troubleshooting.md)

A sheet source shows the grid. Clicking a cell while a slot is armed records the cell in the sheet's bound cells, projects it into data.sheets.<sheetId>.<tab>.<A1>, and binds the slot to that path.

- The bound-cell count on the rail row tells you how much of a sheet is in use.
- Cells that lose their sheet — a deleted tab, a re-import that drops a column — surface as dangling references.
- The projection is read-only: edit values in the Sheets section, never in the Data tab.