A Phase can be divided into multiple Work Categories, which help define the type of work performed when entering time. Work Categories are also useful for budget tracking and scheduling work plans. Click the three-dot on the Phase that you want to add the Work Categories to.
To add Work Categories to a Phase or Subphase, select Add Schedule Item, then choose Add Work Category.
Work Categories can only be added to Phases when the Phase Time Tracking setting is configured to "Track Time By Work Category."Select the desired Standard Work Categories from the list. Multiple Work Categories can be added at once. Click Done to confirm.
Learn more about how to add custom Work Categories
Click Manage Standard Work Categories to open a new page leading to Org Settings > Standards > Work Categories.
The newly added Work Categories will show under the Phase or Subphase.