I know a lot of you reading this probably don’t use Snap (toggled by F9) much, preferring instead to rely on Object Snaps. But for those of you who do, you’ll notice a change to Snap behavior in AutoCAD LT 2012.
Now, Snap only kicks in when you’re specifying points. If you’re just moving the cursor around the drawing, you can move it as freely as you could if Snap weren’t on. But as soon as you’re ready to enter a distance or pick a point—whether you’re grip-editing something or using a regular command—Snap kicks in and restricts you to defined intervals.
This makes it easier to select objects in your drawing (since you don’t have to work as hard to get your cursor precisely over an object), while still giving you the Snap-based precision you need.