You can import an existing Z address by importing it's private key or spending key. Click on Import a private key and add an address name, the key and the address type. If the Z address has balance, the Secure Node should rescan the blockchain upon import of new key.
If you're unable to spend after import, you will need to manually force a rescan on the connected node through an SSH terminal.
sudo systemctl stop zend && zend -rescan
This may take up to several hours, and any zen-cli commands will return an error until the re-scan has completed.
Once the re-scan has completed, you will need to stop zend and restart it with systemd to re-enable process monitoring and automatic certification renewal.
zen-cli stop && sudo systemctl start zend
Figure 3.5: The entire Z address isn’t shown in the Overview list. If you want to see click on icon i for more details.