Increment a Task List

[Elizabeth]

Hello -

I'm creating a complicated Task List/Project Management document.

I'm dividing the project up into a series of Tasks. Each task will
have multiple sub-tasks.

I would like to organize them as follows:

1 Major Task
1.1 Subtask A
1.2 Subtask B
2 Major Task
2.1 Subtask A
2.2 Subtask B

I would like for Excel to automatically update the row tracking number
as I add or delete rows. So if I add a third subtask, I would like it
to automatically update the numbers as follows:

2 Major Task
2.1 Subtask A
2.2 NEW Subtask
2.3 Subtask B

Any suggestions about how to execute this?

Thanks!