{smcl}
{* 23aug2004}{...}
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{center:{hi:Appearance packages {c -} schemes}}
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{center:"Schemes specify the overall look of a graph"}


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{p 4 4 4}{it}
More correctly, this should say that schemes specify what individual elements 
of a graph look like {c -} the font size of a title, the marker color of the
first plot, the width of axis lines, etc.
{sf}

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{p 4 4 4}{it}
Click anatomy below and note that we can change almost every aspect of
what appears on this graph from a scheme.
{sf}

{p 0 2 0}. {stata anatomy101b:anatomy}

{p 0 2 0}o Schemes are simply lookup tables

{p 4 4 4}{it}
When a graph element needs to draw itself, it asks the current scheme
how it should look.
{sf}

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{p 0 2 0}o Let's build a scheme {c -} {view scheme-ourscheme0.scheme}

{p 4 4 4}{it}
Now, let's draw a graph using the default scheme and our new scheme.
{sf}

{p 0 2 0}. {stata sysuse auto , clear}

{p 0 2 0}. {stata scatter displ length weight}

{p 0 2 0}. {stata scatter displ length weight , scheme(ourscheme0)}

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{p 0 2 0}o Let's build a better schemes {c -} {view scheme-ourscheme.scheme}

{p 4 4 4}{it}
And draw our graph with it.
{sf}

{p 4 4 4}{it}

{p 0 2 0}. {stata scatter displ length weight , scheme(ourscheme)}

{p 0 2 0}o How do we know what does what?{p_end}
{p 2 2 0}{help scheme_files:whelp scheme files (forthcoming)}


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{p 4 4 4}{it}
Note that our new schemes now appear in graph dialog boxes in the drop-down 
lists for schemes on the {cmd:overall} tab.  So long as they are stored in your
{help adopath:ado search path} they will be completely integrated into the
graphics system.  You can see that on the {cmd:overall} tab of the 
twoway_overlay dialog box.
{sf}

{p 0 2 0}. {stata db twoway_overlay}


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{p 4 4 4}{it}
The economist scheme is particularly distinctive.  Note how many things
change in the two dot charts below.
{sf}

{p 0 2 0}. {stata graph dot weight , over(rep78) over(foreign)}

{p 0 2 0}. {stata graph dot weight , over(rep78) over(foreign) scheme(economist)}

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{p 4 4 4}{it}
For another example, try the two scatter plots below.
{sf}

{p 0 2 0}. {stata scatter displ length weight}

{p 0 2 0}. {stata graph display , scheme(s1rcolor)}

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{p 4 4 4}{it}
Note that our scheme can be used for all graphs without the need to add the
{cmd:scheme(ourscheme)} {c -} try clicking the following two commands{sf}

{p 0 2 0}. {stata set scheme ourscheme}

{p 0 2 0}. {stata scatter displ length weight}

{p 4 4 4}{it}
We can make {cmd:ourscheme} the default scheme for all future Stata sessions,
by adding the option {cmd:permanently} to the {cmd:set scheme} command.{sf}


{p 0 2 0}. {stata set scheme ourscheme , permanently}

{p 0 2 0}. {stata set scheme s2color , permanently}
		

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{center:{view how.smcl:<<}   {view tindex.smcl:index}   {view whytwo.smcl:>>}}