Blending takes two paths and creates a series of new paths by interpolating the position and attributes of each path. For example, you could blend a blue triangle and a red star to create a series of objects that have increasingly bumpy edges and that are various shades of purple.
To blend two paths together
Select the paths you want to blend.
On the Object menu, click Blend Paths.
In the Blend Paths dialog box, in the Steps field, enter the number of new paths you want to create.
In the Interpolation field, select one of the following methods:
Linear treats anchor points on the source path individually, without regard for how they relate to adjacent anchor points.
Angle and length considers the angle and distance of each anchor point's adjacent anchor points when it interpolates. This method often gives you smoother intermediate shapes.
The resulting paths (referred to as in-betweens) are grouped together, and the original source paths are not affected in any way by blending.
Note that the direction of each of the two source paths can have a significant effect on blending. If you do not like the result of Blend Paths, try undoing it, reversing the path order of one of the two paths, and blend them again.
If you select three or more paths and blend them, Microsoft Expression Design blends the first two paths, and then the second and third paths, and so on. The order of the paths depends completely on the object stack. The first path is the bottom-most in the stack. The final path is the top-most path. The value that you specify in the Steps field determines the number of steps between each source object, and not the total number of paths created.