next, previous Section / Table of Contents / Index You start BALSAC ((C) Copyright 1991-2005 K. Hermann) from the command line by typing BALSAC {options} or balsac {options} followed by the [enter] key where {options} are a number of options available at startup which will be explained later and in Sec. 6.1. If no options are selected defaults are assumed and BALSAC moves to its initial logon screen as displayed in Sec. 6.1 with an initial option menu Select: [L]attice [C]luster [M]ouse(off) [T]each(off) [?,]Quit from which you can choose between running a BALSAC/LATTICE session (studying periodic crystal/surface sections), running a BALSAC/CLUSTER session (studying atom clusters), toggling flags of the mouse mode, and teach mode (don't before you know what you are doing!), and quitting. All these options are available to you by simply pressing the respective option key which is enclosed in square brackets [ ] in the option menu, see also Sec. 5.5. Options may also be selected with the mouse pointer using mouse mode, see Sec. 3.3.8, but for now you stick to keyboard input. If you need help on any of the above options just press "?" followed by the option key and a short explanation will appear. The next sections will tell you what to do with these options. Note, however, that BALSAC can run correctly ONLY if an initialization file (its name is defaulted to 'balsac2.ini') and an on-line help file (default name is 'balsac2.hlp') exists in you present working directory or an appropriate directory path has been set. next, previous Section / Table of Contents / Index