Ctrl A - Select all items in the current list.
Ctrl D - Remove the selected songs from the database.
Ctrl F - Bring up the Find/Search dialog.
Ctrl I - Show information about the currently highlighted song.
Ctrl O - Open Windows' Explorer with the current highlighted song selected.
Ctrl R - Refresh the selected songs or all songs, if no songs are selected.
Ctrl , - (Ctrl Comma) Brings up the preference settings, showing the most recently accessed section.
DEL - You can remove songs from the current song list with delete. This will not affect your database.

 Some of the less obvious and more useful shortcuts are:

• To select all items in a list, press CTRL-A. This is useful, for instance, in selecting all the songs in the current playlist.
• To play all the songs in the playlist without selecting them, press the CTRL key while clicking the Play button. (Normally the Play button will only play "selected songs" if any songs are selected.)
• To play an entire album, simply double-click on the album name.
• To play all songs by a single artist, simply double-click on the artist's name (the songs will be shuffled according to the currently selected shuffle type first).