Hi! flora. 暖める＝make the cold place to be warm　《example》 kono heya wo danbouki de atatameru 温める＝make something cold to be warm　《example》 kono nomimono wo atatameru 変更する＝ change something in the future (schedule, reservation, menu, etc) 《example》kaigi no gidai wo hennkou suru. ずらす＝ change something from A to B locally, even if it was a little bit. also we use ずらす when to change the time to be later. 《example》tana no iti wo zurasita. ／ yakusoku wo 1:00 kara 1:30 ni zurasita.