To double-click on a keyboard, the shortcut keys combination that you can use to select a word or entire text is Ctrl + Shift + the left/right arrow. You should press the right arrow followed by ...

To insert a double arrow, type a less than sign, one equals sign, and a greater than sign: <=> You can also use the Symbols option on the Insert tab in Word 2010 and 2007 if you need a specific ...