Here you can specify how Apollo forms the title for tracks that have an ID3 tag (assuming "Ignore ID3 tags" is not turned on from Options dialog->General). The button above the edit control brings up a menu containing all possible variables you can use in the string.

If there is no ID3 tag found, the title suggested by the input plug-in is used.

This string specifies the format for the title of both the main and the mini window. The button above the edit control brings up a menu containing all possible variables you can use in the string.

This is the string that appears in the status sub-window of the main window. It is also used as a tool tip for the minimized icon in the icon tray area and the mini window title area. The button above the edit control brings up a menu containing all possible variables you can use in the string.