Enabling snap assists in Windows 10?

Solution 1:

Source Hands-on with Microsoft's new Windows 10: UI changes that look great at first blush

In Windows 8, apps can be snapped by clicking the Windows key and the left or right arrow, snapping them to the left or right of the screen. That fills half the screen. With Windows 10, up to four apps can be snapped per screen, maximizing your productivity.

What’s neat, though, is that once you snap an app, Windows 10 suggests another, similar app that you might want to snap next to it, from a small collection of windows. The feature is intended to save you the hassle of hunting about through menus to actually construct a virtual desktop.