3. Activate the left neighbour tab if present:

```json
{
  "activate_on_close": "left_neighbour"
}
```

### Show close button

- Description: Controls the appearance behavior of the tab's close button.
- Setting: `show_close_button`
- Default: `hover`

**Options**

1.  Show it just upon hovering the tab:

```json
{
  "show_close_button": "hover"
}
```

2. Show it persistently:

```json
{
  "show_close_button": "always"
}
```

3. Never show it, even if hovering it:

```json
{
  "show_close_button": "hidden"
}
```

### Show Diagnostics

- Description: Whether to show diagnostics indicators in tabs. This setting only works when file icons are active and controls which files with diagnostic issues to mark.
- Setting: `show_diagnostics`
- Default: `off`

**Options**

1. Do not mark any files:

```json
{
  "show_diagnostics": "off"
}
```

2. Only mark files with errors:

```json
{
  "show_diagnostics": "errors"
}
```

3. Mark files with errors and warnings:

```json
{
  "show_diagnostics": "all"
}
```

### Show Inline Code Actions

- Description: Whether to show code action button at start of buffer line.
- Setting: `inline_code_actions`
- Default: `true`

**Options**

`boolean` values

## Editor Toolbar

- Description: Whether or not to show various elements in the editor toolbar.
- Setting: `toolbar`
- Default:

```json
"toolbar": {
  "breadcrumbs": true,
  "quick_actions": true,
  "selections_menu": true,
  "agent_review": true,
  "code_actions": false
},
```

**Options**

Each option controls displaying of a particular toolbar element. If all elements are hidden, the editor toolbar is not displayed.

## Enable Language Server

- Description: Whether or not to use language servers to provide code intelligence.
- Setting: `enable_language_server`
- Default: `true`

**Options**

`boolean` values

## Ensure Final Newline On Save

- Description: Removes any lines containing only whitespace at the end of the file and ensures just one newline at the end.
- Setting: `ensure_final_newline_on_save`
- Default: `true`

**Options**

`boolean` values

## LSP

- Description: Configuration for language servers.
- Setting: `lsp`
- Default: `null`

**Options**

The following settings can be overridden for specific language servers:

- `initialization_options`
- `settings`

To override configuration for a language server, add an entry for that language server's name to the `lsp` value.

Some options are passed via `initialization_options` to the language server. These are for options which must be specified at language server startup and when changed will require restarting the language server.

For example to pass the `check` option to `rust-analyzer`, use the following configuration:

```json
"lsp": {
  "rust-analyzer": {
    "initialization_options": {
      "check": {
        "command": "clippy" // rust-analyzer.check.command (default: "check")
      }
    }
  }
}
```

While other options may be changed at a runtime and should be placed under `settings`:

```json
"lsp": {
  "yaml-language-server": {
    "settings": {
      "yaml": {
        "keyOrdering": true // Enforces alphabetical ordering of keys in maps
      }
    }
  }
}
```

## LSP Highlight Debounce

- Description: The debounce delay in milliseconds before querying highlights from the language server based on the current cursor location.
- Setting: `lsp_highlight_debounce`
- Default: `75`

**Options**

`integer` values representing milliseconds

## Format On Save

- Description: Whether or not to perform a buffer format before saving.
- Setting: `format_on_save`
- Default: `on`

**Options**

1. `on`, enables format on save obeying `formatter` setting:

```json
{
  "format_on_save": "on"
}
```

2. `off`, disables format on save:

```json
{
  "format_on_save": "off"
}
```

## Formatter

- Description: How to perform a buffer format.
- Setting: `formatter`
- Default: `auto`

**Options**

1. To use the current language server, use `"language_server"`:

```json
{
  "formatter": "language_server"