You can apply fills to any enclosed area by using the Smart fill tool. Unlike other fill tools, which fill only objects, the Smart fill tool detects the edges of an area and creates a closed path so that the area can be filled. For example, if you draw a freehand line that crosses over itself to create loops, the Smart fill tool can detect the edges of the loops and fill them.
In the example above, the original spiral object is duplicated and offset, resulting in enclosed areas that can be filled by using the Smart fill tool.
Because the Smart fill tool creates a path around the area, it essentially creates a new object that can be filled, moved, copied, or edited. This means that the tool can be used in one of two ways: to fill an area or to create a new object from an area.
Although primarily used to fill areas, the Smart fill tool can also be used to create new objects. In the example above, the original objects — the two spirals (left) — are deleted (right), but the fill remains because each filled area is actually an object.
You can apply the default fill and outline to the area, use the property bar to specify a specific fill color and outline, or create an outline with no fill.
When you use the Smart fill tool on areas that already have fills applied to them, remember the following:
If you click outside an enclosed area, a new object is created from all objects on the page, and the selected fill and outline options on the property bar are applied to the new object.
The outline width is centered on an object’s path. Because the Smart fill tool detects paths, not outlines, thick outlines appear partially covered by the new object. You can uncover the original outlines by changing the stacking order of the objects. For information about changing the stacking order of objects, see To change the order of objects.