For more on output, including a guide on what to save, see the topic Output in SORTIE.
The summary output file contains basic summary data for each timestep in the run. It is exactly like it was in previous versions of SORTIE. You choose what data you want SORTIE to save using "Edit->Output options". The choices are:
Basal area is in square meters per hectare, and density is in numbers per hectare. Relative values are in proportions. Each data type is calculated separately for each species, and absolute data types also include a total across species. For a definition of the different tree types, see the Trees topic.
You can define areas within the plot to track separately. These are called subplots. These subplots do not have to be continuous, and you can define more than one. In order to define subplots, use the Edit Subplot window. The output options you choose for the main window will apply to the subplots too. You cannot define separate options for them.
Output files are saved as tab-delimited text files with a ".out" extension. You can open them in almost any spreadsheet or word processing program. There is a column for each species for each data type. Each timestep is one row. If you have defined subplots, there is a row for each subplot for each timestep.
You can view graphs of summary output files using SORTIE's data visualization functions.