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

# Preferences

> Customize how Arca looks and behaves for you: theme, task defaults, sidebar, and privacy.

Preferences are saved per device and apply only to you. Changes take effect immediately, no save button needed.

To open your preferences, go to **Settings > Preferences** in the sidebar.

## Appearance

### Theme

Choose how Arca looks on your device. Options: **System** (follows your OS setting), **Light**, or **Dark**.

### First day of week

Set which day your calendar week starts on. Options: **Sunday**, **Monday**, or **Saturday**.

### Sidebar customization

Click **Customize** to choose which sections and items appear in your sidebar. See [Sidebar customization](/general-features/sidebar-customization) for details.

<Tip>
  You can also access sidebar customization by right-clicking any whitespace in the sidebar and choosing **Customize sidebar** from the context menu.
</Tip>

### Show task counts in lists

When enabled, each list in the sidebar shows the number of open tasks next to its name.

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## Tasks

### Default view

Choose how tasks are displayed when you open a list. Options: **List** or **Board**.

### Group tasks by

Group tasks in list view by a common field. Options: **No grouping**, **By assignee**, **By status**, or **By priority**.

### Sort tasks by

Control the default order of tasks in list view. Options: **Name**, **Create date**, **Due date**, or **Priority**.

### Show completed tasks

When enabled, completed tasks are shown inline alongside active ones. Disable this to hide completed tasks and keep the list focused.

***

## Privacy

### Usage analytics

When enabled, Arca sends anonymous usage data to help improve the app. No personal data or task content is ever shared.