Here is a great short-cut or method for copying and pasting using the Control (Ctrl) keys ?
Click and drag the mouse over the text or item you wish to copy to select it.
Hold down the Ctrl key and press C to copy it, or X to cut it.
Click the mouse where you wish to paste the item.
Hold down the Ctrl key and press V to paste your item. Some people get confused and think it is Ctrl and P (Which is to print) Try it a few times it's a really quick easy way to copy and paste text and other items.
If you wish to select everything use Ctrl + A to select all. Ctrl + C = Copy Ctrl + X = Cut Ctrl + V = Paste Hope This Helped !