To use Search Mode.
(Search from the Database)

Click on the Search Button.
Choose an item to search by.
Type in your terms.
Options for search are in the settings.

To use Jump Mode.
(Search in the current list)

Click on the Jump Button. (May not be in your skin)
Or, double-click any unused area of the screen. (If enabled in settings)

The keyboard will come up.
Type in a search term.
The list will "Jump" to the nearest item.