“You can’t put the camera there, you’ll cross the line”

There’s a lot more to shooting a great scene than just planting a camera somewhere and yelling action. We all want to shoot a scene that can be cut together to achieve great continuity with a good variety of shots.

The 180-degree rule is a cinematography guideline that states that two characters in a scene should maintain the same left/right relationship to one another. When the camera passes over the invisible axis connecting the two subjects, it is called crossing the line and the shot becomes what is called a reverse angle. Reversing the angle is commonly thought to be disorienting and can distract the audience from the intent of the scene.

 

More information: https://indiefilmhustle.com/180-degree-rule/