NEW FEATURES
New Google Material Design template and artboard sizes.
Adds support for Sketch-Mirror and @3x scaling.
Align and Distribute tools now work for Vector points too.
You can now measure the distance from a shape to a grid or guide line using the Alt key as well.
Alt + click on the Inspector's align buttons to align the entire selection with their parent artboard.
Added a new preference to choose the resolution to which bitmaps are flattened when doing Layer › Flatten Selection to Bitmap.
When rotating objects, the pivot point can now be moved.
Shift+Return now inserts a line break instead of a paragraph break in text editing mode.

http://bohemiancoding.com/sketch/support/updates/sketch-3.2/

之前beta 版时的介绍：
http://www.uisdc.com/design-tool-sketch-3-2-release