Scale Tool

Select the scale tool from the Tools Panel, or simply press "T" to choose the Transform tools, then hold Ctrl+Shift to switch to the scale tool.

When you drag with this tool, Curvy uses the point where you first pressed the mouse button down as a centre point - then scales the object about this centre point as you drag.

You can access this tool while editing an object by using LMB+Ctrl+Shift. When you are editing a curve you need to use RMB+Ctrl+Shift, because LMB+Ctrl+Shift chooses the Redraw Curve Tool.

If you have grouped objects together, using the scale tool will scale the selected object and all its children.