# Grab Tool

Grab Tool allows users to grab vertices using the brush.

Grab is an elastic deformation tool.

<div align="left"><figure><img src="/files/9N8HrS9lD5aO0qpisBs9" alt=""><figcaption></figcaption></figure></div>

There are several options that affect how Grab Tool works.

| Option           | Description                                                   |
| ---------------- | ------------------------------------------------------------- |
| Type             | Grab Type                                                     |
| Stiffness        | How much the mesh resists shear                               |
| Incompressiblity | How compressible the spatial region is: 1 - 2 x Poisson ratio |
| IntegrationTime  | Integration Time for elasticity                               |
| BrushSteps       | Integration steps                                             |

Users can press Ctrl + Z to Undo and Ctrl + Y to Redo the operation.


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