How to Assign Vertices to a Vertex Group in Blender

Assigning vertices to a vertex group in Blender is a fundamental process used for rigging characters, controlling modifier effects, and managing complex 3D geometry. This guide explains the exact steps to select geometry in Edit Mode, navigate the Object Data Properties tab, and assign or remove vertices with specific weight values.

Step-by-Step Guide to Assigning Vertices

1. Enter Edit Mode

  1. Select your 3D mesh in the viewport.
  2. Press Tab on your keyboard (or use the drop-down menu in the top-left corner of the Viewport) to switch from Object Mode to Edit Mode.

2. Select the Vertices

  1. Ensure you are in Vertex Select mode by pressing 1 on your keyboard (not the numpad) or clicking the vertex icon in the top-left menu.
  2. Select the specific vertices you want to add to the group. You can hold Shift to select multiple individual vertices, or use selection tools like Box Select (B) or Circle Select (C).

3. Access the Object Data Properties Panel

  1. Locate the Properties Panel (usually on the right side of the Blender interface).
  2. Click on the Object Data Properties tab, represented by a green triangle icon with three dots at the corners.

4. Create or Choose a Vertex Group

  1. Under the Vertex Groups section, click the + (plus) button on the right to create a new group.
  2. Double-click the newly created group name (e.g., "Group") to rename it for better organization.
  3. If the group already exists, simply click on its name in the list to highlight it.

5. Assign the Vertices

  1. Set the Weight slider located below the Vertex Groups list. A weight of 1.000 means full influence, while 0.000 means no influence.
  2. Click the Assign button located directly beneath the group list.

Verifying and Managing Your Selection

Once vertices are assigned, you can verify your selection using the control buttons below the Vertex Groups list:

  • Select: Deselect all vertices in the viewport (Alt + A), highlight your vertex group in the list, and click Select. Blender will highlight all vertices assigned to that group.
  • Deselect: If you have active vertices selected in the viewport, clicking Deselect will unselect any of those vertices that belong to the active group.
  • Remove: To unassign vertices from a group, select the target vertices in the viewport, select the vertex group from the list, and click Remove.