diff --git a/docs/en/source/camera_devices/4_application_guide/launch_parameters.md b/docs/en/source/camera_devices/4_application_guide/launch_parameters.md
index c7177cbd..9a5a8ba5 100644
--- a/docs/en/source/camera_devices/4_application_guide/launch_parameters.md
+++ b/docs/en/source/camera_devices/4_application_guide/launch_parameters.md
@@ -276,7 +276,7 @@ The following are the launch parameters available:
 * **`upgrade_firmware`**
   * The input parameter is the firmware path. For new versions, use the standalone `firmware_update_tool` for firmware updates. See [firmware_update_tool Tool](../6_benchmark/firmware_update_tool.md).
 * **`preset_firmware_path`**
-  * The input parameter is the preset firmware path. If multiple paths are input, each path needs to be separated by `,` and a maximum of 3 firmware paths can be input. For new versions, use the standalone tool to burn presets. See [firmware_update_tool Tool](../6_benchmark/firmware_update_tool.md).
+  * The input parameter is the preset firmware path. If multiple paths are input, each path needs to be separated by `,` and a maximum of 3 firmware paths can be input. This parameter is only for burning or upgrading preset firmware; after burning, set `device_preset` to switch to a preset. For new versions, use the standalone tool to burn presets. See [firmware_update_tool Tool](../6_benchmark/firmware_update_tool.md).
 * **`uvc_backend`**
   * Optional values: `v4l2`, `libuvc`. See [Lower CPU Usage](../5_advanced_guide/performance/lower_cpu_usage.md) for low-CPU scenarios.
 * **`connection_delay`**
diff --git a/docs/zh/source/camera_devices/4_application_guide/launch_parameters.md b/docs/zh/source/camera_devices/4_application_guide/launch_parameters.md
index 6f2fed7d..936abf82 100644
--- a/docs/zh/source/camera_devices/4_application_guide/launch_parameters.md
+++ b/docs/zh/source/camera_devices/4_application_guide/launch_parameters.md
@@ -275,7 +275,7 @@
 *   **`upgrade_firmware`**
     *   输入参数为固件路径。新版本建议使用独立工具 `firmware_update_tool` 进行固件升级，参考 [firmware_update_tool 工具](../6_benchmark/firmware_update_tool.md)。
 *   **`preset_firmware_path`**
-    *   输入参数为预设固件路径。如果输入多个路径，每个路径需要用 `,` 分隔，最多可输入3个固件路径。新版本建议使用独立工具烧录 preset，参考 [firmware_update_tool 工具](../6_benchmark/firmware_update_tool.md)。
+    *   输入参数为预设固件路径。如果输入多个路径，每个路径需要用 `,` 分隔，最多可输入3个固件路径。该参数只用于烧录或升级 preset 固件；烧录后如需切换使用某个 preset，请设置 `device_preset`。新版本建议使用独立工具烧录 preset，参考 [firmware_update_tool 工具](../6_benchmark/firmware_update_tool.md)。
 *   **`uvc_backend`**
     *   可选值：`v4l2`、`libuvc`。低 CPU 场景建议参考 [降低 CPU 使用率](../5_advanced_guide/performance/lower_cpu_usage.md)。
 *   **`connection_delay`**