@c -*-texinfo-*-
@node Common Command Line Options, Configuration File, Options, Options
@subsection Common Command Line Options
@cindex Common Command Line Options
@cindex Command Line Options
@cindex Options, Command Line

All Crystal Space applications respond to a common set of command line
options.  Many applications define additional options which are specific
to that particular application.

The most immediately useful command line option which all applications
respond to is @samp{-help}.  This command list all of the other options to
which an application responds.

The default setting for each command line option is set internally in the 
program unless there is a corresponding line for it in the configuration file.  
Command line options always override default values.  

Some interesting options to play with are:

@table @code
@item -mode=640x480
Use this option to set the size of the display.

@item -canvas=sdl2d
Use this option to select the type of 2D canvas to use.

@item -video=opengl
(or software, ...).
Use this option to select type of display driver to use.  Other options
are @code{software}, @code{null}, etc.

@item -relight
Use this option to recalculate all lightmaps after you changed lighting
or geometry in a level that you're trying. If you don't do this you either
get the old lightmaps or no lightmaps at all.
@end table
