Magento : How do I activate drop down menus?

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This magento discussion was started by conticreative 0n 23 December 2008

I apologize in advance for asking a question that has been answered before. However, when I tried to follow instructions contained in other posts, I either received server errors or they simply did not work.

So the question is this:

I have a template called “Greyline” in a fairly basic installation of Magento.
I have multiple categories and subcategories.
I would like the menu to display the subcategories as drop downs.

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