A: Firstly, to see what the various binning entries are take a look in the contour_binning.xml file. This file resides in the data folder on the ioGAS installation folder (eg. C:\Users\USERNAME\AppData\Roaming\ioGAS\userConfig and contour_binning.xml file to binning.xml). To add a custom bin entry say for the 50th and 80th percentiles at the bottom, copy and paste an existing bin entry and make the changes as required. Save the contour_binning.xml file and re-start ioGAS for the changes to become available. The bin percentiles represent the maximum value of the bin range.