By ctrl+left clicking anywhere on your map, you can add a map note. Once the note is added, you can right click on the note to edit, delete, or send it to any other player using this mod. When sending or receiving a note, it will appear on the map in the position where the creator put it, and will contain the same text. It will also send a chat message to the person receiving the note alerting them of what zone the note was sent for. The player you are sending the note to must be online at the time you send it.