---
title: "Editing a gas"
description: "Reopen a gas in the builder from its own card, work through the steps it shows, and remove a cylinder you are not carrying."
---

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

# Editing a gas

import { GasWizard } from "@/components/react/ModalScreens";

A gas already in the plan is changed from its own card, never from **Add Gas
Mix**. Three controls sit in the card's top corner, past the mix name.

- **Edit gas mix**: the pencil. It opens the gas builder on this gas.
- **Blend mix**: opens the blending calculator with this gas as its target. See
  [Blending](/gases/blending).
- **Remove gas mix**: the ✕, drawn in the alert tone, takes the gas out of the
  plan at once.

## The builder in edit mode

1. **Step 1**

   The dialogue opens on **Tank Configuration**, subtitled *Editing* and the gas's
   name where a new gas reads *New gas mix*. Every field arrives holding what the
   gas already carries.

2. **Step 2**

   Work through the same steps an added gas runs, with a limits step for each
   circuit the gas is used on. Nothing is skipped because the gas exists, and each
   back button names the step it returns to.

3. **Step 3**

   **Finished**, on the confirm step, writes the changes back, and the gas keeps
   its place in the list. Closing the dialogue any other way leaves the gas as it
   was.

Watch for:

- **The configurations offered are the ones this gas may take**, by the rules in
  [Cylinder configurations](/gases/cylinder-configurations). Editing the plan's
  back gas keeps the back-gas configurations available.
- **The role follows the cylinder configuration**, so a gas moved into a stage
  is a gas whose role has moved with it. See
  [Gas names and labels](/gases/names-and-labels).
- **Removing a gas is immediate.** There is no confirmation and nothing to undo,
  and an open-circuit plan left without a Bottom Gas will not advance to the
  Review step.

## Next

[Blending](/gases/blending) turns a mix you have settled on into the fill
sequence that produces it.

Source: https://docs.divelogic.ai/gases/editing/index.mdx