Using action groups

The actions in a project can be organized hierarchically. This is useful for keeping track of complicated projects, or breaking actions into smaller actions without creating a whole separate project.
To give an action some child actions, thus turning it into a group:
Select the action you want to be the parent of the new group.
Choose Add Child from the Edit ▸ Outlining menu, or press Command-}.
To create a group from some existing actions:
Select all of the actions you want to group.
Choose Group from the Edit ▸ Outlining menu, or press Command-Option-L.
Also, you can indent some actions to make them children of the action immediately before them in the outline:
Select the actions you want to indent, making sure that there's an action before them in the outline.
Choose Indent from the Edit ▸ Outlining menu, or press Command-], or click one of the items' handles and drag to the right.
If you mark an action group complete, all of its child actions are also marked as complete.
You can even nest groups within other groups, but that can get pretty ridiculous pretty quickly. If you have more than two levels of hierarchy in one project, you might want to consider splitting things up into separate projects.
Making a project sequential or parallel Organizing projects into folders →