To make it easier to find players in the main window, you can sort the list to your own preferences.
You may order by all the visible fields (columns), simply by clicking the heading above the coloumns. If you want to order by a non-visible field you must first make the field visible by clicking "Select" in the main window. Read the "hints" for more information on the criterias for ordering. Pay special attention to the columns for available, color and result
You can also sort by additional criterias from the Options-menu.
This sorting is purely cosmetic, and has no impact on standings or pairing order. For more info on that, see ranking.