Ctrl + 1 shows tray 1 Ctrl + 2 shows tray 2 Ctrl + A selects ALL the pieces in the active window Ctrl + F transfers the selected piece(s) to the other tray Ctrl + G toggles between full screen and normal mode Ctrl + H invokes the SCORES window Ctrl + J brings single pieces to the foreground Ctrl + K auto-arranges the pieces Ctrl + O opens an existing puzzle file Ctrl + P invokes the PREVIEW window Ctrl + R restarts the puzzle Ctrl + S saves the puzzle Ctrl + T invokes the SETTINGS window Ctrl + U auto-completes the puzzle Ctrl + V pastes a picture on the clipboard as a new puzzle Ctrl + W closes the current puzzle Ctrl + Y redoes the last command that was undone Ctrl + Z undoes the last command Alt + F4 exits Puzzlepalooza Ctrl + Shift + F brings selected piece(s) to front Ctrl + Shift + B sends selected piece(s) to back Ctrl + Left Click selects a piece Ctrl + Right Click moves selected piece(s) from one window to another Space Bar toggles between TRAY #1 and TRAY #2 Esc quits full-screen mode or auto-complete