In this menu you will find the standard commands you already know from other programs: Undo, Cut, Copy, Paste, and Delete selected text as well as the search.
By clicking on the menu item "Search" your cursor will jump to the closest available search box depending on which window is active.
Example: You can search all your bookings by using the search box at the top of the booking list in the main window.
If you are using Lodgit Desk on Windows, you can find the Preferences here. For more information about preferences, see the chapter about preferences.