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

# Subject

> The Subject component fits subject selection scenarios in K-12 schools, such as interest class registration. It supports Multiselect mode, and each grade level has a fixed standard subject list as the Data source.

## 1. Use Cases

Use the Subject component in K-12 school scenarios that require subject selection, such as registration for subject-based interest classes.

## 2. Basic Features

### 2.1 Multiselect Mode

The component supports selecting multiple subjects. To allow only one subject, turn off this toggle.

| **Form design mode** | **Form runtime mode** |
| -------------------- | --------------------- |

**Note: The Subject component does not support data filling.**

## 3. Data Source

Each grade level is mapped to a standard subject list on the backend. This list cannot be modified yet.