The Internet tab lets you define the pattern URLs that you use to perform targeted searches in the Internet, for example in a dictionary.
You can have as many entries as you wish, but only the first 10 will have a hotkey assigned, either Alt+n within ApSIC Xbench or with Ctrl+Alt+n (with the numeric keypad in this latter case in Num Lock mode) from any Windows application. n can be a number from 0 to 9, where 0 means the 10th entry in the list.
You can use the Up and Down buttons to move an entry up or down in the list, or the Delete button the remove it.
The up to 10 entries with a key assigned appear in the Internet menu.
You can use Internet->Capture URL to capture URLs into this list.