[whpalmer4]

Create another task. Tap on the task to edit. In the Info pane, there's a Move button, tap it. You'll get a list of places where you can move it. This is covered in the last paragraph of the "Adding Projects and Actions" page in the Help (tap on the gear menu, then select Help)

Once you've got an action group in place, you can use drag and drop editing to move other actions inside of it. Tap the Edit button, then drag actions around with the drag handles (three horizontal bars at the right end of the row). The only catch is that you can't drag an action to be a new last row in a group (because there's no way to determine whether you meant for it to be the new last row in a group, or a non-indented row following the group). That's easily overcome; just drag to the penultimate spot, then drag the last row forward. Tap Done when done editing.