Here you can configure network options:

Computers
Is a list containing all computers detected on your network.
When you use Network Clipboard for the first time, you'll need to fill this list using the Scan button. Also you may need to use the Scan button to detect any new computer on your network. You must check the proper computer's box on the list to enable it to connect to your Network Clipboard.
Use the Computers button or right-click the Computers list box to get more options.

Scan
Click this button to scan your network for Windows computers. Detected computers will appears on Computers list.

Default port
Enter an available port to use with Network Clipboard communications. All computers on your network should use the same port to allow connections between computers.

Use only computer name
Check this box to use only remote computer's names only (to validate), or using fully qualified host name (including DNS suffix).

For Example:

Computer Name: SERVER1
Fully qualified: SERVER1.mshome.net

(mshome.net is the DNS suffix for remote client).

Send Message
Check this box to enable use of Send Message option on Main Menu / File. Send Message allows local user to send text messages to other user(s) on your network, using Windows services (no need of Network Clipboard running on remote computers).

Favorite computers
Fill this list with the computers you'll work most on your network. The hint to use Favorites is to keep it smaller, just with frequently used computers (computers you'll get Clipboard content). This way, you have a quick access to the most used computers.
You can fill this list selecting proper Computers from list, and drag and drop those computers to the Favorite computers box.
Right-click Favorite computers box for more options.