In a live streaming software, such as Live Companion, click on the Live Streaming Settings - Video Settings option, select the 4:3 aspect ratio, set it up, then click on the screen, hold down ALT and drag the four sides of the screen with the left mouse button to crop it, and then enlarge it to match the screen aspect ratio.Because the 11-inch iPad has a non-standard 4:3 aspect ratio, there will be a small black border at the bottom.

The OBS Settings are the same. Click on the Settings, and in the video Settings, manually modify the canvas ratio of 1920*1440 to 4:3. The output ratio at the bottom is also set to 1920*1440. After setting it, return to the main page, click on the screen and hold down ALT without releasing it. Drag the four sides of the screen with the left mouse button to crop it. Then right-click the screen and select Transform to match the screen ratio and enlarge it. There will also be a small black border at the bottom.

The 12.9-inch tablet has no black borders and is in the standard 4:3 aspect ratio.In the live streaming software, for example, Live Companion, click on the live streaming Settings - Video Settings option, and select the 4:3 ratio.After setting it up, it will be a full-screen display with no black borders.

The OBS Settings are the same. Click on the Settings, and in the video Settings, manually modify the canvas ratio of 1920*1440 to 4:3. The output ratio at the bottom is also set to 1920*1440. After setting it up, the main interface will be full screen.

In the live streaming software, for example, Live Companion, click on the Live Streaming Settings - Video Settings option. Horizontal Screen Games/Live Streaming Select the 16:9 aspect ratio, Vertical Screen Live Streaming select the 9:16 aspect ratio.