Problem

You want to reorganize the category assignments of entries en masse.

Solution

Use the Power-Editing mode to change the primary category assignments as needed.

Discussion

As your weblogs evolve over time, a reorganization of category assignments may eventually be necessary. A good way to handle such a reorganization is with the Power-Editing tools that can be accessed from the Entries Listing. Using this tool you can view all entries as editable records and change their primary categories. This technique only works for category assignments designated as primary. Adjusting secondary category assignments can be done using the Entries Listing category filter to get a list of any assigned entry and manually editing each. Another more automated option for developers is to use the Movable Type API to manipulate the data directly.