Printer shows offline on Windows

Windows loses track of the printer after a router restart. Two minutes to put it back.

1. 1
   Open Settings › Bluetooth & devices › Printers & scanners and pick the printer.
2. 2
   If it says Offline, choose Remove device, then Add device and let Windows find it again on the network.
3. 3
   Still offline? Turn the printer off, wait ten seconds, turn it on, and check it has an IP address on the same Wi-Fi as the PC.
4. 4
   If it comes back and drops again, the router is handing it a new address each time — a work order fixes that in one session.