Tool:Morph Target Subpalette

From ZBrush Info

The Morph Target sub-palette settings allow management of the currently stored morph target geometry. Once a morph target has been assigned to an object, the Morph deformation becomes available so that you can blend between the model’s actual geometry and that of its morph target.

StoreMT: Saves the selected 3D object’s current geometry as a morph target. After deforming the object (either via the Deformation sub-palette or by sculpting in Edit mode), you can use the Morph slider (see below) to blend between the object’s deformed shape and its morph target.

Switch: Stores the current object’s geometry as its morph target and reverts its shape to that of the previous morph target.

Restore: Undoes all deformations on the current object and reverts its shape back to the stored morph target.

DelMT: Removes the morph target so that a new one can be stored.

CreateDiff: Creates a new mesh based on the difference between your morph target and the model's current shape.

Morph: Adjusts amounts of morphing; may be negative to cause morphing in the opposite directions.

Morph Distance: Used when morphing ZSphere models, to ensure that distances between linked ZSpheres are not overly affected by the morphing.

To use Project Morph do the following:

1. Set your geometry level to the highest level. For this example, let's say level 5.
2. Store a morph target by pressing Tool: Morph Target: StoreMT.
3. Go down 2 levels of resolution to level 3 and delete all higher levels of resolution by pressing Tool: Geometry: Delete Higher. Don't worry, your hi-rez geometry is still there because we stored a morph target.
4. Smooth out the area you want to 'relax' with the Smooth Brush.
5. Divide two more times to return your model to resolution level 5.
6. Set the Tool: Morph Target: Project Morph slider to 100. This will project the morph target with the stetched polygons into your current smooth mesh. The result is a 'relaxed' mesh.