I am new to Android (Nexus 7) and have two questions please.  The first is; across the top of my screens are a bunch of little wedggies (for lack of a better term) aligned from the left.  What are these?  I suspect they may represent running programs.  If that is the case do I have to close them?  If so, how?  Also; I use my tablet very sparingly to check my email and then erase them all.  I see how to delete the emails individually but surely there is a "select all" choice so I can delete them en-mass rather than go through 40 or 50 emails and have to delete them one at a time.  Where is this option?
Thanks in advance... Bob
				
			Thanks in advance... Bob
 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		
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