If you'd like to change which edge of the screen the pointer moves across, you can rearrange your displays in Windows:
Click the Start menu and open Settings.
Go to System > Display.
Under Rearrange your displays, you'll see your monitors represented as numbered boxes.
Drag the monitor icons so they match the physical position of your screens.
Click Apply to save the changes.
After that, moving the mouse to the corresponding edge of one screen will move it naturally to the other monitor.