Press the TAB key on the keyboard in the game interface, and the map of the place will open. There is a small button in the upper left corner of the map frame. If you click on it, all NPCs in this position and their coordinates will be listed. You can also talk to the dream elf, enter the name of the NPC you are looking for, and it will answer your specific location.
If you are a teacher, find someone to demonstrate. If you don't want to find it bit by bit, you have to use the eye operator.