Type in the name of the file you want the data saved into. If a file with this name already exists, the old file will be deleted. All the data is saved as text. The first line of the file will give the name of the graph and the name of the model. Under this will be one line with labels for each column of data, and then the data will follow, with each column containing the data from one of the info items in that graph, and the first column giving the timesteps.
Histograms have a slightly different data format than other graphs.
The first two lines will be the same, but in this case the column headings actually indicate the titles of the following rows of data. The first row after the column headings will contain a single number, the timestep. After this will be a row of data for each item in the histogram, each row of data giving the values in each bin of the histogram. Then the next timestep will be saved, then the next rows of data, and so on. This is a very inconvenient way to save the data, and I'm open to suggestions.