1) Press Ctrl + Tab keys is a different way to select a running program on your computer.
2) The step to number or bullet line space is, go to the ribbon and pick the one that you what to do.
And press Ctrl + V to make multiple copies of the text. If you press Ctrl + B , +I, or +U, it changes the format of the text in Microsoft Word.
3) The way to create three colums is by going to the layout page and pressing the arrow & it gives you the options to tell how many colums you want.