In many cases it is useful if the PID of a page is displayed inside the pagetree. So, you don't have to place your cursor over the page and wait a second.
This is done by placing a short config in the TSconfig of the backend-user or the backend-group. The result is a pagetree like you can see it on the image on the right.
If you found a mistake or if you have a good tip or suggestion, please contact me at thomas(at)typo3-unleashed.net. I will check it and correct the entry or insert the new one.
Thanks in advance for your help.