[support] How do I identify Node IDs?

[Agon S. Buchholz]

Hi,

every node in Druapl has a Node ID (NID) by which internal handling is
managed. Using the NID is also the safest way to link to a node. But how
do I identify the NIDs?

At the moment you're installing a tool like "Pathauto" or "Urlify", all
NIDs are being hidden from the URL; that's the idea of semantic URLs,
but how do I now identify the NIDs, e.g. to create stable links to this
node?

Is there any setting to display the NID somewhere in the node itself, or
 maybe a module that provides a "Node info" block containing this
crucial piece of information?

Thanks, -asb