When a window is active, ALT+F4 closes the active window. When no windows are active (i.e., Show Desktop), the Windows Shut Down/Restart/Log off dialog appears.
This F5 key / shortcut is not documented anywhere. Other keys I have mapped on the OSX settings work perfectly on Evernote: F6: Paste. F4: Cut. F3: Select All.
Open the selected note in a separate window (Alt + F4 to close window). Ctrl+Shift+e. Send selected notes by email. Ctrl+p. Open Print dialog for selected notes.
Alt+F4 Close child windows and hide main window (minimize to tray). Exit application. Start spell-checking. Open online help web page in default browser. Start ...