Jia, OverlapStart means that peak overlaps with the start of the feature. For details in other categories, please type ?annotatePeakInBatch in R. Thanks! Best regards, Julie On 5/12/11 5:34 PM, "Jia Jin Kee" <jiajin@umich.edu> wrote: Hi Julie, I have a question regarding the annotatePeakInBatch function. How does the function categorize the peak locations for the 'insideFeature' column, particularly for 'overlapStart' (ie what is the distance range for a peak to be categorized as 'overlapStart')? Thanks in advance Jia Jin Kee [[alternative HTML version deleted]]