Global Lists: Task Priorities [in-depth guide]
Here you can manage the Task Priority labels beyond the defaults of High, Medium and Low.
Navigation
Main Menu > System Setup > Global Lists > Task Priorities
Setup
By default there are three labels, 1 - High, 2 - Medium and 3 - Low.
If you re-sort the list, the top most label is always "1 - Name", then next is "2 - Name" and so on. This is important to know if you create a detailed list as this will determine how this field sorts in Today Creatives and various reports.