The first task is to create a new category.

2. Let's create a new category for questions related to burning fossil fuels—I know the science department is interested in those. Give your new category a name.

3. Select the parent category (you might not need to worry about this just yet). For example, energy questions might be categorized under Physics, which in turn is under Science.

4. Although you don't have to, give your category a meaningful description. It will make your new category friendlier to your colleagues if you decide to share it with them.

5. When you are happy with the settings of your new category, press the Add category button. The Edit categories page will be updated to show your new category, and how it fits into the hierarchy of other categories. For example, the parent of my new category is my course, basically...