Which represents any set of one or more samples whose replicates are Peak List files (ie.: .csv) and the result produced of applying Peak Detection to Raw Data. You can load these files with the Load Peak List operation. Every time a new Peak List is accessible, it can be inspected with the data viewer.
Mass-Up is able to peak lists from comma-separated values files (.csv), where the first column is the mass and the second is the intensity.
The following lines show an example of a valid .csv file:
Mass,Intensity 72.38649,4.7928915 92.86101,11.554423 103.110954,23.025375 115.28742,8.338575 135.57188,76.37024 137.58994,57.889793