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Glyph stores configuration settings in the following YAML files:
# Your _Project Configuration_ is stored in the @config.yml@ file, included in each Glyph Project.
# Your _Global Configuration_ is stored in a @.glyphrc@ file in your code[$HOME] (or ==\/code[%HOMEPATH%]== on Windows) directory (not created by default).
# The _System Configuration_ is stored in the source directory of Glyph itself.

When compiling, Glyph loads all these configuration files and merges them according to the following rules:
* A setting configured in the _Project Configuration_ overrides the same setting in both Global and System configuration.
* A setting configured in the _Global Configuration_ overrides the same setting in the _System Configuration_.

Typically, you should use the _Project Configuration_ for all project-specific settings and the _Global Configuration_ for settings affecting all your projects (for example, you may want to set the $>[document.author] in the Global Configuration instead of setting it in the Project Configuration of all your Glyph projects). The _System Configuration_ is best left untouched.

Instead of editing your configuration settings directly, you can use the #>[config], as follows:

@glyph config@ _setting_ _\[value\]_

If no _value_ is specified, Glyph prints the value of the configuration setting, so typing @glyph config document.author@ right after creating a project (assuming you didn't set this in the Global Configuration) will print nothing, because this setting is blank by default.

To change the value of a configuration setting, specify a value right after the setting, like this:

@glyph config document.author "John Smith"@

	tip[It is also possible to change configuration settings inside your document, using the %>[config:].]

In this way, the document author will be set to _John Smith_ for the current project. To save this setting globally, add a @-g@ option, like this:

@glyph config -g document.author "John Smith"@

	box[Regarding configuration values and data types...|
Glyph attempts to "guess" the data type of a configuration value by evaluation (@Kernel#instance_eval@) if the value:
* is wrapped in quotes (@"@ or @'@) → @String@
* starts with a colon (@:@) → @Symbol@
* is wrapped in square brackets (@\[@ and @\]@) → @Array@
* is wrapped in curly brackets (@{@ and @}@) → @Hash@
* is _true_ or _false_ → @Boolean@
* is _nil_ → @NilClass@

Note that this guessing is far from being foolproof: If you type something like _{:test, 2}_, for example, you'll get an error. 
	]

There are plenty of configuration settings that can be modified, but most of them are best if left alone (and in the System Configuration file). 

For a complete reference, see =>[#cfg_ref]. For everyday use, you may just want to change the settings defined in the =>[#cfg_document] namespace.
	] --[End textile]