You have several sources of help.

1 -	your manual

2 -	help items under the Info menu

3 -  clicking once on the arrow in the upper corner will display context sensitive help.  Pressing the H key or the Help key will give the same results.

- HIDE GAME QUICKLY (in case your boss is coming)

Press the ESCAPE key.

This will hide the board and give a normal looking menu bar.  

To unhide the board press the Escape key again or select  Resume under the File menu.    

Note:  If you have made another program the active program then you will have to select the game again from the application menu, then do the above to unhide it.