diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/figures/custom_dialog_sm.png b/zh-cn/application-dev/key-features/multi-device-app-dev/figures/custom_dialog_sm.png
index 1cf3cff5e48e373d057bf4dca8f48cf2689d0dcc..331059acfc254ace6883b3624280252134ef1b83 100644
Binary files a/zh-cn/application-dev/key-features/multi-device-app-dev/figures/custom_dialog_sm.png and b/zh-cn/application-dev/key-features/multi-device-app-dev/figures/custom_dialog_sm.png differ
diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/typical-layout-scenario.md b/zh-cn/application-dev/key-features/multi-device-app-dev/typical-layout-scenario.md
index 7f03669d97747365761699c1c9c65b818ff587fd..b67ec12b4420b93425932f64cfc1f3079584ffe1 100644
--- a/zh-cn/application-dev/key-features/multi-device-app-dev/typical-layout-scenario.md
+++ b/zh-cn/application-dev/key-features/multi-device-app-dev/typical-layout-scenario.md
@@ -625,7 +625,7 @@ struct TripleColumnSample {
 
 | sm                                           | md                                      | lg                                      |
 | -------------------------------------------- | --------------------------------------- | --------------------------------------- |
-| 弹窗居中显示，<br>与窗口左右两侧各间距24vp。 | 弹窗居中显示，其宽度约为窗口宽度的1/2。 | 弹窗居中显示，其宽度约为窗口宽度的1/3。 |
+| 弹窗横向居中，纵向位于底部显示，与窗口左右两侧各间距24vp。 | 弹窗居中显示，其宽度约为窗口宽度的1/2。 | 弹窗居中显示，其宽度约为窗口宽度的1/3。 |
 | ![](figures/custom_dialog_sm.png)            | ![](figures/custom_dialog_md.png)       | ![](figures/custom_dialog_lg.png)       |
 
 **实现方案**