The C1ComboBox control provides a context menu for additional resources at design time. Right-click on the C1ComboBox control to open its context menu. 

The C1Input context menu operates as follows:

About ComponentOne Input
Clicking the About ComponentOne Input link displays the About ComponentOne Input dialog box, which is helpful in finding the version number of the control and online resources.

Edit Items...

Clicking the Edit Items... opens the String Collection Editor where you enter strings in the collection one per line.