Eye-candy fans (such as me) will appreciate that the Start menu is transparent. It's also customizable. You can change the menu's height (but not its width) by pulling down the double-headed arrow that appears at the top when you move your cursor over it and dragging it to make it the menu taller or shorter. Oddly enough, a double-headed arrow appears when you put your cursor on the right side of the menu, implying you can change its width, but I wasn't able to drag the arrow to do that.
There's a lot more you can do to customize the Start menu. You can group related applications and then name them -- for example, you might want to put the Groove Music, Movies & TV and Xbox apps into a group that you call Entertainment. You can also pin and unpin apps to and from the Start menu and Taskbar, and resize the tiles by right clicking on them. Depending on the app's capabilities, you might also be able to turn a live tile off so that it's static instead of displaying changing information. (I found this a surprisingly useful feature. With too many tiles flashing at me, I felt at times as if I was in a Vegas casino.)
Right-clicking also lets you uninstall apps. Some Microsoft apps, though, can't be uninstalled, including the Movies & TV, Calendar and Groove Music apps. They can, however, be unpinned from the Start menu; if you want to run them later, you can type their name into Cortana.
The upshot? The Windows 10 Start menu is more than just a redone version of its Windows 7 predecessor. With it, you run both Windows 10 apps and desktop apps, which goes a long way towards making Windows 10 feel like a truly integrated operating system.
Continuum and tablet mode
Also helping to unify the operating system is a new feature called Continuum, which lets Windows 10 perform a shape-shifting trick by detecting the type of machine you're running, and then changing its interface to the one suited for the device. It's particularly useful for two-in-one devices such as the Microsoft Surface Pro, which works as a tablet or laptop, depending upon whether you have a keyboard attached.
And the OS will change dynamically. If you're using the tablet with a keyboard attached, you see the desktop-based interface, complete with Start menu. Detach the keyboard and you get a pop-up notification that asks if you want to switch to tablet mode. If you don't want to be bothered by the notification again, you can select "Remember my response and don't ask again." From then on, you'll switch automatically from desktop to tablet mode and back again.
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