Hi Yu, I am not quite sure what you mean by ?increase the resolution?. Your display or any graphics device that you chose for your Gviz plot has a finite number of pixels available for plotting. Now if you selected a device with dimensions 500x500 pixels, the minimum width that you can distinguish on that plot will be roughly width/500. In genomic coordinates that is typically not much, and it may well be that your 5kb bins have exactly the same size as your 5bp bins. The simple solution is to pick a wider device, e.g, do png(width=2000, height=500) instead of png(width=500, height=500). That being said, there are plotting parameters that control the minimum width of a range (min.width and min.distance, you may want to check the documentation for the RangeTrack class for details). Florian From: Yu Zhou <y6zhou@ucsd.edu> Date: Thursday 7 August 2014 07:30 To: Florian Hahne <florian.hahne at="" novartis.com=""> Subject: question about Gviz Dear Florian, Thanks a lot firstly for developing Gviz! I'm using it a lot and refer it in my recent manuscript. One question is how to improve the resolution for histogram figure? When making the figure small, 50 bp interval looks like the same width as 5000 bp or even longer intervals. Any suggestion will be appreciated. Thanks again! Best regards, Yu ------------------------------------------------------- Yu Zhou, Ph.D. Postdoc in Fu Lab Department of Cellular and Molecular Medicine School of Medicine University of California, San Diego 9500 Gilman Dr, La Jolla, CA 92093-0651 Lab Phone: 858-534-4926