IsoSnapping Tool

Using IsoSnapping Tool, any object containing the Iso Transform can be easily moved around in units you specify by dragging.

1. Press Ctrl+L, having Auto Snap selected, specify the units you want the objects to be snapped to.
2. Make sure the object you are moving had the Iso Transform object added to it.
3. Select the Move Tool on the top left of the Unity main window.
4. Simply copy, paste, and drag building blocks to build a level.