Simple Task ID Question

[Des]

I'm really new to Project and I'm already stumped by what I think
should be a pretty simple thing to do. How do I list a number next to
each task that increases from top to bottom, no matter what? When I
reorder my tasks, the task ID won't change, so for instance I have task
#34 listed above task #2. I'd like a number column that starts at 1 and
counts up to my last task, so that when I print out a gantt chart for a
meeting and I say "refer to task #10", for example, everyone will be
able to easily scan the page and find #10. How do I do this?

Thanks!