To copy and paste a string of text or an image from one window to another, first highlight the content you wish to copy, right click and then select the copy option. Next, open your other window, right click in a blank field and select paste.
Instead of using your mouse to right click, you may also use the keyboard's commands. To highlight text, place the mouse cursor before or after the text you wish to copy, hold down the shift key and press the arrow key in the direction you wish to copy the text. Once all your text is highlighted, press CTRL+C (copy) and open your second window, and in a blank area, press CTRL+V to paste.