When the WeChat video number is broadcast live, the horizontal screen live broadcast mode is usually supported, but the specific operation mode may change according to the update of WeChat version. According to the previous information, the user should be able to find a button to adjust the screen direction in the live broadcast interface, which is usually located in the lower left corner or the upper right corner of the interface to switch from portrait screen to landscape screen.

If you don't find the option of landscape mode in the live broadcast of your WeChat video number, the possible reasons are:

1. Software version problem: Make sure that your WeChat is the latest version, because the new version may add or modify some functions.

2. Device compatibility: Some devices may have compatibility problems, especially the differences in software adaptation of specific models of tablet computers or mobile phones.

3. Live broadcast setting restrictions: Sometimes you need to set the landscape mode in the background when the live broadcast starts, and you can't change the screen direction after the live broadcast starts.

4. Permission issue: Make sure that the application has obtained permission to adjust the screen orientation.

The recommended operation steps are as follows:

? Check and update WeChat to the latest version.

? Look carefully for the icon that switches the screen direction in the live interface. Sometimes this icon may not be obvious.

? If you still can't find it, try to enter the settings of WeChat to see if there are any settings related to live broadcast or display direction.

? If you use external live broadcast equipment or software (such as Tencent Live Assistant), please make sure that the landscape mode is set in the live broadcast background.

If the above methods can't solve the problem, you can consider contacting WeChat customer service or consulting the official help document for more specific guidance.