I'm feeling dummylike as I'm setting up an Asus Nexus 7 for my wife, got it updated to Android 4.4.4 but just do not see where the 3-dot Share button or icon is hiding. My rooted Nook Tablet has that button (next to the Home and Back buttons at the bottom of the screen); my Galaxy S4 has it. But where is it on the Nexus? I'm used to tapping it to bring up the Share options--email, text, FB, Instapaper etc.