Originally posted by: scott
Xylitol,
Are you using the "Help Browser" inside Mathematica?
That's the first place top seek your answers.
Also, suggest that you download the "getting started" notebook you'll find linked about 1/3 way down on this page.
Show
Show[graphics, options] displays two- and three-dimensional graphics, using the options specified.
Show[a, a, ? ] shows several plots combined.
Show can be used with Graphics, Graphics3D, SurfaceGraphics, ContourGraphics, DensityGraphics and GraphicsArray.
Options explicitly specified in Show override those included in the graphics expression.
When plots are combined, their lists of non-default options are concatenated.
Show is effectively the analog of Print for graphics. The option DisplayFunction determines the actual output mechanism used.
Functions like Plot automatically apply Show to the graphics expressions they generate.
You can display a GraphicsArray object using Show.
GraphicsArray sets up identical rectangular display areas for each of the graphics objects it contains.
GraphicsArray takes the same options as Graphics, with the defaults for Ticks and FrameTicks changed to None.
GraphicsArray takes the additional option GraphicsSpacing, which specifies the spacing between the rectangular areas containing each graphics object. The default setting is GraphicsSpacing -> 0.1.
The options DisplayFunction, ColorOutput and CharacterEncoding are ignored for graphics objects given inside GraphicsArray.
Show Expression
Show Expression toggles between expression and displayed form of a cell.
In expression form, you are seeing the underlying Mathematica expression as it would be saved in a file.
You can edit the cell in either expression or display form, and when you toggle the form, the changes will be reflected in the other form.
When editing in expression form, you must be careful to enter only syntactically correct expressions. If there is an error in the expression when you toggle back to display form, it will be reported, and the offending part of the expression will be selected.
etc., etc., ...