Move the mouse over the keyboard to see which splits belong to which key (note the velocity restriction also),
Use the Preset Layer drop-down list to choose layer.
The column to the left shows a list of available generators.
The first column is the Global split. There is always a Global split, even if it is empty. If a value is defined in the Global split, but not in the split itself, then the global value will be used. ,
The values define in this table are combined with the corresponding values in the Preset layer.