Douglas Harper's Etymology Dictionary
Usage examples of "split-screen".
Commercial broadcast stations, preempted by the speech, have begun to air split-screen footage, showing Vittori's broadcast studio in the Presidential Palace and the Joint Chamber between Jefferson's Senate and House of Law.
He gazed through the eyepieces of the comparison microscope, adjusted the focus and then moved the stages so the samples were next to each other in the split-screen viewfinder.
It was as if there was a split-screen process going on in his head.