Number of Channels in Each File Select the number of channels within each data file. A unique row is created in the output file for each channel within each file. For detailed information about the files and data sets used or created by JMP Life Sciences software, see Files and Data Sets. To Specify the Number of Channels in Each File: Click and drag the slider to the left or right to decrease or increase, respectively, the number of channels. Alternatively, type the number of channels directly into the text field.