I do not use a mouse with the laptop. I use the touchpad for all in-game controls, and when I need to move the map i would either use the touchpad to move the cursor near the edge of the window, but mostly I'd use the arrow keys to move the map. If I need to move the map around a lot, to see what's out there, then for sure i'd be using the arrow keys. If I need to move the map a little bit so i can move a character or target an enemy, then odds are i'd just move the cursor to the edge using the touchpad. I do find using the arrow keys much more convenient to move the map because you can quickly move it in all directions compared to having to move the cursor to that edge of the screen, so even if i was not playing in window mode i'd still be using the arrow keys for map scrolling.