Click "Sync to EU" or "Sync to NA" to automatically populate the fields and sync the time to the latest rare in the region.
Alternatively you can change the fields manually (like add 3-4 minutes to "Last killed at" so the timer tracks when the rare actually becomes active/killable).
Set the "Show amount" field to manually decrease/increase the list size. Default 20 is a full one rare rotation.
Check the "Play sound" -checkbox to enable an audio notification when a rare is spawning.
Click the copy icon next to the coords () to copy a macro to clipboard. Paste it to in-game chat to add a map pin to the Icecrown map.
Check the "Show sound column" -checkbox to choose whether a sound notification is played for each rare (check the box next to ♫ in the header to enable/disable all).
Check the "Show assign class column" -checkbox to show dropdown list of each class for every rare to quickly track on which alt you want to kill the rare.