How to get Cortana off my taskbar?

Okay so I have Windows 10 on my Surface Pro. I like to draw on it as a tablet with the keyboard removed, but I'm left-handed and whenever I put my hand down to draw, Cortana always comes up. It's driving me NUTS. How can I make it so Cortana is off my taskbar, so when I put my hand over it, it won't show up?