I am trying to create child tasks to better organize my project, every command that is related to child tasks including link as chain, indenting, and branching seem to be disabled. Is there a setting that allows child tasks to be created?
You can only add child tasks when in WBS mode.
To switch to WBS mode, select WBS from the Gantt Mode drop down in the Task ribbon.
You can always switch back to view your schedule by Activity Code or List after you’ve added the children tasks.