What is the relationship between the viewports displayed by the camera in 3D? What is the numerical ratio of output size, height and width set in max and F 10? I don't know much about it ~ the setting

What is the relationship between the viewports displayed by the camera in 3D? What is the numerical ratio of output size, height and width set in max and F 10? I don't know much about it ~ the setting meeting The security box (shif+f) displays the comparison column of the graph, that is, the aspect ratio of the image you set in f 10. This is the value that determines the shape of your rendering, and the value above determines the length, width and size of your image. That is to say, if the aspect ratio value remains the same, whether you increase or decrease the size will not affect the viewport, but the viewport size will change when the aspect ratio is adjusted.