> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/e3d-user-manual/interface/toc175916526/input-data/the-fill-down-command.md).

# The "Fill Down" Command

How to fill an entire column or a selected range of table cells with the same value.

When working in the tables, it is often convenient to fill a column or a specific range of cells with the same value. The "Fill Down" command makes this very easy.

The command works in two modes:

* To fill an ***entire*** column with a specific value, right click on the cell containing the desired value and click OK.
* To fill a specific ***set*** of cells with a specific value, highlight the set of cells to be changed, then right-click on the cell containing the desired value (can be anywhere in the current table) and click OK.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.enercalc.com/e3d-user-manual/interface/toc175916526/input-data/the-fill-down-command.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.