With Developer Handoff you can do the following:
- View overall specifications of the artboard and what it contains.
- Select and view specifications for desired layer.
- Copy the value of any specifications, by clicking on the value and the value will be added to the clipboard.
- View artboard properties - colors and typography.
- Select a layer and hover over other layers to see the distance between them in pixels.
- Turn grid settings on and off from the Sketch canvas settings.