Some themes have one, some have over a dozen, and some are nested. How are these layout files called? I read somewhere else that they are all defined in a
config.xml but I can't find that for each theme.
For example, in one theme I have in
-local.xml -sales --billingagreement.xml --recurring_profile.xml
In other themes I don't even have a
local.xml. So my question is, I thought the layout files controlled the placement of blocks, widgets, the content in general. But how does the layouts work when there are multiple of them and they are specific to different programmatic circumstances?