Scoreboard is a large “numeric readout” that shows coordinates for points, anchors, guidelines etc. as you’re moving them with your pointer. Useful if you’re working on a large monitor where the normal UI elements are tiny.
To open the Scoreboard, use the View > Scoreboard toggle. You can move the Scoreboard all over the screen just by dragging it.
To resize the Scoreboard, drag any of its edges or corners.