if you're referring to enabling the Seam debug page, it's done like so in components.xml:
<core:init debug="@debug@" jndi-pattern="@jndiPattern@"/>
where @debug@ is a token variable that is read from components.properties.
if you used seam-gen to create your project, debug page should be already enabled.
from SIA book:
Seam’s debug mode is controlled by the debug property on the org.jboss.
seam.core.init component. You enable the debug mode flag by adding the following
declaration to the component descriptor: