GapTimePrev(resultID;rankID;text first;time format) calculates the gap time between a participant and the previous participant. The resultID determines which result to consider; the rankID determines who is the previous athlete; text first is the text to show for the first athlete; and time format specifies how to format the gap time. For example:

GapTimePrev(1;3;"--";"+m:ss,kk") 

Using the default Results (Result ID 1 = Finish Time) and Ranks (Rank ID 3 = AGRank) this would return the time behind from the previous runner, in the same age group, based on finish time.

The third and fourth parameters can be omitted. "-" and "+HH:MM:ss,kk" are the default values.