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4.3.1 Directive Characters

CHAR is the character for which you want to create a new directive (Quick Start used #\` as an example). Note that FoCus allows you to modify standard directives as well as creating new ones. This means that you can create a completely new directive, freely override a standard directive with a new meaning, alias a standard directive to a new character, anything you want.

If such a directive is already set in TABLE, FoCus throws a table-directive-collision error, unless you explicitely pass a non-nil value to the :force keyword argument.