You can use several methods to add a new ports bundle.
1. Use "Edit -> Add bundle" main menu option.
2. Click "Add Bundle" icon on the main toolbar.
3. Press hotkey combination "CTRL+Insert" to add a new ports bundle.
4. Finally, you can add a bundle by right-clicking any entry in the Serial Splitter Configuration tree and selecting "Add bundle" from a drop-down menu that appears.

In the process of new ports bundle creation you will be asked to enter a bundle's name. You can assign any name you like for it or leave a default name ("New bundle"). A newly added bundle will be automatically split into two parts: IN and OUT. Use "Right Arrow" key or double-click on the bundle itself to see this.
In order to finalize the process of a ports bundle creation you have to add incoming and outgoing ports to the IN and OUT sides. (Refer to MANAGING PORTS section for details).