There was a small display screen in the Falcon cockpit. I presume for the Navi computer? It’s seen (and heard) being used in ESB, but we never actually see what they’re looking at, so darned if I know where it actually is on the console.
It’s a small screen to the left of the center of the console:
You can see it on set in this BTS pic:
Luke’s Landspeeder was intended to have a scanner display, and animation for tracking down Artoo was actually made but was cut.
Easy to miss that display when it’s off.
The Landspeeder scanner display could have been intended to be in one of those boxes on either side of the window?