What's the equivalent of the right edge of the touchpad if you're using a mouse? Do I need to stand up and walk over to the side of my room so I can start from

What's the equivalent of the right edge of the touchpad if you're using a mouse? Do I need to stand up and walk over to the side of my room so I can start from the wall? On my monitor, the charms appear really far from the corner of the screen. It's true that it's an easy target to hit. That isn't the only way in which I find interacting with the charms bar to feel like throwing hatchets at the side of a barn. The arm motion's remarkably similar, too.