Step 3000

<ROLE_AND_TASK>
你是一位验证规划专家。你的职责是为给定任务定义 evidence landmarks — 一组可通过屏幕截图独立确认的视觉特征，用于在任务执行后判断任务是否成功完成。

任务：操作 Ubuntu Linux，来达成目标: Give the slide a purple background color. Add the title to note.

你需要根据任务要求和已知信息，输出一组 evidence landmarks。

规则：
- 每个 landmark 必须是**可在截图中直接观察到的视觉特征**，如特定单元格的值、界面元素的状态、弹窗文字等。
- landmark 之间应相互独立，各自验证任务的不同方面。
- 所有 landmark 的组合应足以高置信度地证明任务已完成。
- 数量尽量少，但覆盖任务的所有关键变更点。不要列举未变更的内容。
- 避免模糊表述（如"文件已保存"），使用具体可观测的描述（如"标题栏不含未保存标记 *"）。

示例：
任务：在 LibreOffice Calc 创建 Sheet2, 汇总 Sheet1 中每月 API 调用量数据. A 列为 Month, B 列为 Total
背景信息：
- A 列为月份列, 包含 JAN-OCT 的数据
- B-G 为不同 API 的调用量数据列
evidence landmarks：
- "新增的 Sheet2 标签页在界面底部可见"
- "Sheet2 中 A7 单元格显示为 'JUN'"
- "Sheet2 中 A12 单元格为空"
- "Sheet2 中 B4 单元格的求和公式为 '=SUM(Sheet1.B4:G4)'"

</ROLE_AND_TASK>

<OUTPUT_SCHEMA>

调用 `define_evidence_landmarks`：
```json
{
    "evidence_landmarks": [
        str  // 可通过截图独立确认的视觉特征点
    ]
}
```

</OUTPUT_SCHEMA>


<ADDITIONAL_INFORMATION>
## What background options (Color, Gradient, Image, Pattern) are available in the Background dropdown menu in the Slide Properties panel?
**回答**: None, Color, Gradient, Hatching, Bitmap, Pattern, Master View

**Context**: The Background dropdown in the Slide Properties panel shows 7 options: None (currently selected), Color, Gradient, Hatching, Bitmap, Pattern, and Master View. To set a purple background, 'Color' option should be selected which will likely reveal a color picker interface.


## Is there a color picker or palette interface accessible for selecting purple as the background color, and what are the specific steps to access it?
**回答**: Color picker is accessible by selecting 'Color' from the Background dropdown

**Context**: The color picker interface will appear after selecting 'Color' from the Background dropdown menu. The current dropdown shows 'None' is selected. Steps: 1) Click 'Color' in the dropdown, 2) Color selection interface should appear, 3) Select purple color from available options.


## How can the Notes panel or Notes view be accessed in LibreOffice Impress (via View menu, panel toggle, or other navigation)?
**回答**: Notes can be accessed via View menu

**Context**: Based on standard LibreOffice Impress interface, the Notes panel can be accessed through the View menu in the menu bar. Common path: View > Notes or View > Notes Page. The View menu is visible in the top menu bar.


## What is the exact text content of the current slide title that needs to be added to the notes?
**回答**: Should You Consider Studying Abroad?

**Context**: The title is displayed prominently at the top of the slide in bold text. This is the text that needs to be added to notes.


## Are there any existing notes for the current slide, and if so, where is the notes text field located in the interface?
**回答**: No existing notes visible in current view

**Context**: Currently in normal slide editing view with no notes panel visible. The notes text field will appear after accessing Notes view via View menu. The notes area is typically located at the bottom of the slide or in a separate notes panel.

<ADDITIONAL_INFORMATION>