EditCompositeRegion - Interactive Graphics Mode

In addition to the regular features of Interactive Graphics Mode, the EditCompositeRegion has a right-click menu which lets you graphically Add Subregion, Remove Subregion, or change a Subregion Operation.

Tip:

When working with polygons in Interactive Graphic Mode, you can grab and move points as well as add or remove points along the shape's edge.

When the mouse is over the shape's edge the cursor will change to an arrow with "+" which lets you add a new point. Clicking on the point to move it to a new position Use Shift + Alt and click the point to remove it.