## Key Down

**post** `/computers/{id}/key-down`

Press and hold a keyboard key. Use with key_up to release. Supports modifier keys (shift, ctrl, alt, meta) for complex interactions like Shift+Click.

**Supported keys:** Modifier keys (shift, ctrl, alt, meta), special keys (enter, escape, tab, backspace, delete, space), arrow keys (arrowup, arrowdown, arrowleft, arrowright), navigation (home, end, pageup, pagedown), function keys (f1-f24), and any single character (a-z, 0-9).

**Key names are case-insensitive:** "shift", "Shift", and "SHIFT" all work.

**Example Shift+Click:** 1) key_down "shift", 2) click at coordinates, 3) key_up "shift"

### Path Parameters

- `id: string`

### Body Parameters

- `key: optional string`

  Key name to press. Case-insensitive. Examples: "shift", "ctrl", "a", "Enter"

- `tab_id: optional string`

  Optional tab ID for browser sessions (ignored for desktop sessions)

### Returns

- `ActionResult = object { error_message, executed_tab_id, page_context, 4 more }`

  - `error_message: optional string`

  - `executed_tab_id: optional string`

  - `page_context: optional V2GoBackendInternalTypesPageContext`

    - `device_scale_factor: optional number`

    - `is_main_tab: optional boolean`

    - `page_height: optional number`

    - `page_width: optional number`

    - `scroll_x: optional number`

    - `scroll_y: optional number`

    - `tab_id: optional string`

    - `title: optional string`

    - `url: optional string`

    - `viewport_height: optional number`

    - `viewport_width: optional number`

  - `request_id: optional string`

  - `result: optional map[unknown]`

  - `status: optional string`

  - `timestamp: optional string`

### Example

```http
curl https://api.tzafon.ai/computers/$ID/key-down \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $TZAFON_API_KEY" \
    -d '{
          "key": "shift"
        }'
```