When the program exits, the state of all options is saved, and they are restored the next time the program starts up.
Options - Options opens the Options dialog, which allows setting options individually. This is the same as touching the 'O' key, or clicking the Options button near the bottom of the screen.
Options - Presets allows the use of several frequently-used combinations of options. The presets and their values are:
Options - Reset to Defaults restores all options to their original state.
Options - Read Options reads a file of previously-saved options.
Options - Write Options writes the current set of options to a file for later reading.