When you use a tool in the Map or Layout window, the window scrolls if you drag the tool outside of the window boundaries. The window will continue to scroll until you release the mouse or move the cursor back into the window.
Press Esc to stop scrolling; the tool remains active.
To cancel the tool, press Esc after the scrolling has stopped. Autoscrolling works with any tool that can be dragged; it does not work with single-click tools, such as the Pan or Info tools.