Problem

You want to assign more then one category to an entry.

Solution

Follow the Assign Multiple Categories link found on the New/Edit Entry screen.

Discussion

As discussed in "Posting a New Entry", you can assign a category to an entry with the Primary Category pulldown menu. Assigning multiple secondary categories works a bit differently.

From the New/Edit Entry screen, click the Assign Multiple Categories link under the Primary Category pulldown menu. A list will appear with the names of every category in the system. The primary category assignment will be disabled. Check the names of each category that you want to assign the entry to. Click anywhere off the list widget to close it.

Before version 3.2, users were required to save a new entry before multiple categories could be assigned. This is no longer true.