Note: A Spreadsheet
element does not have a primary output.
You can save results for a Spreadsheet element by clicking Final Values and/or Time Histories. Checking one of these causes all output arguments to be saved.
If the element has multiple outputs, and you wish to save only one or two of these as results, you can use the context menu of the output in the browser (accessed via a right-click on an output) to turn on or off a particular output. In this case, the checkbox in the dialog would then become a box instead of a check (indicating that only some of the results will be saved). Note that in order to see outputs in the browser you must first ensure that Show element subitems is selected by right-clicking anywhere in the browser.
Note: A Spreadsheet
element does not have a primary output.