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

# Fill modes

> The builder's three fill modes (Quick, Form, and Grid), what each is for, and when to use which.

<Info>
  The submission builder has three fill modes: **Quick** (the default, one record at a time), **Form** (one record, with a computed preview), and **Grid** (a spreadsheet for many rows). All three edit the same submission, so switching never changes your data.
</Info>

When you open the builder to create or edit a submission, you fill it in through one of three modes. You switch between them from the toggle in the builder header. Quick and Form are single-record modes. Grid is for entering many rows at once. This page explains what each mode is for and when to reach for it.

## At a glance

| Aspect                                    | Quick                                            | Form                                       | Grid                                              |
| ----------------------------------------- | ------------------------------------------------ | ------------------------------------------ | ------------------------------------------------- |
| Best for                                  | One record, fast                                 | One record, watching the computed output   | Many rows at once                                 |
| Rows shown                                | One                                              | One                                        | All rows in the submission                        |
| Layout                                    | Compact stacked form, option pills for dropdowns | Vertical form with a sticky computed panel | Spreadsheet: columns are fields, rows are records |
| Paste from a spreadsheet                  | No                                               | No                                         | Yes                                               |
| Available when the submission has 2+ rows | No                                               | No                                         | Yes                                               |
| Default                                   | Yes                                              | No                                         | No                                                |

No mode is "better." They suit different workflows. Quick is the fastest way to enter a single record. Form is best when you want to watch a deep computed chain build as you type. Grid is what you want when you have twenty rows and a spreadsheet open in the other tab.

## Quick mode

**Quick** is the default when you open the builder. It is a compact, single-record form: each field stacked, with dropdowns rendered as option pills you tap or click. It is the fastest path for entering one campaign and works well on a narrow or touch screen. Computed fields still show their derived values as you fill in their sources.

Reach for Quick when you are entering a single record and want minimal chrome between you and the fields.

## Form mode

**Form** is also single-record, but laid out as a vertical form with the computed fields collected into their own sticky **Computed** panel. As you fill in the user-entered fields on one side, the panel shows the live values of every computed field (in the Campaign URL Builder example: `utm_campaign`, `tagged_url`, `short_url`, and the `qr_code` image) updating as you type.

That panel is the reason to choose Form. When a computed chain runs several levels deep, watching it recompute in real time makes it obvious where the chain broke if something looks wrong. Fields that cannot compute yet (because a source is still blank) stay empty rather than showing noise.

## Grid mode

**Grid** is a spreadsheet. Columns are the taxonomy's fields, rows are the records in the submission. It supports the things you expect from a grid:

* **Paste from a spreadsheet.** Copy a block of cells from Excel or Sheets and paste into the grid. Columns map by position and extra rows are appended automatically. See [Bulk entry in grid mode](/recipes/bulk-entry-grid-mode) for the full paste workflow.
* **Add, duplicate, and delete rows.** Use the grid controls and the row gutter. Deleting a row removes it from the submission; the submission itself is untouched.
* **Drag to reorder rows.**
* **Fill handle and multi-row selection**, for editing many cells at once.

Computed fields appear in Grid as read-only columns and update live as their source cells change, the same as in the other modes. You can show or hide the computed columns from the grid controls.

## Switching modes

You switch modes from the toggle in the builder header. The rule that governs availability is simple:

* A submission with **one row** can use any of the three modes.
* A submission with **two or more rows** can only use Grid. Quick and Form cannot show more than one record, so the toggle disables them and the builder stays in Grid.

So when you add a second row (you add rows from the grid controls), the builder moves you to Grid automatically. Whenever a submission is back down to a single row, you are free to switch to Quick or Form again.

<Note>
  Switching modes never changes the submission's data. Whatever you entered in one mode is there in the others. The modes are just different views of the same rows.
</Note>

## Related

* [The submission pipeline](/concepts/submission-pipeline): what runs on every save, in every mode.
* [Bulk entry in grid mode](/recipes/bulk-entry-grid-mode): the full paste-from-spreadsheet workflow.
* [Submissions reference](/reference/submissions): the submission lifecycle.
* [Tutorial: Campaign URL Builder](/tutorial): uses these modes during the worked example.