One of our goals for Movable Type 3.2 was to make the system more pleasant to work with every day. And one of the small improvements in this version that we think will help save the time (and sanity!) of all of us who use Movable Type every day is a revamp of the way authors can select multiple categories for an entry.
Movable Type has long supported assigning multiple categories to any entry, and since version 3.1, you've also been able to easily create an infinite number of subcategories as well. But the default drop-down box hadn't evolved to accommodate these powerful new options, and solutions like putting a giant collection of checkboxes next to every entry would add to amount of items on the screen and create visual clutter.
So, with the twin goals of simplifying multiple category selection and preventing an abundance of categories from distracting from the entry that you're trying to write, we made a slick new category selection drop-down, seen here.
[This is part sixteen in a series called "Our 32 Favorite Features of Movable Type 3.2".]