Sometimes it is necessary to compare the work of annotators to be able to improve annotation quality. The function giving the essential information for this purpose can be accessed via Tier > Compare Annotators.... Select a tier for each of two annotators and click Compare. In the table that now appears overlapping annotations are in the same row. The begin time and end time of each annotation is given as well as the amount of overlap, the total extent (time from lowest begin time till highest end time) and a value that indicates the agreement: overlap / extent. The average agreement is printed above the table. By clicking Save the information in the table can saved into a text file.