Drag the handle to wipe between the old and new map. Turn on Zoom (above the map) to magnify on hover — click pins a spot so you can sweep the handle and compare it across versions. The toggle buttons above the map overlay objects — Trees, Camps, towers, runes, lotus pools, gates, tormentors, shrines, outposts, watchers and Roshan — each split old/new by the slider, so sweeping shows what moved. Pick a patch from the heading on the right.