| Subdivide | Shift + D | Subdivides the currently active model. An active model is the model under the cursor when the hotkey is pressed. |
| Step Level Up | Page Up | Displays the next densest (higher) subdivision level on the active model. An active mesh is the mesh under the cursor when the hotkey is pressed. |
| Step Level Down | Page Down | Displays the next coarsest (lower) subdivision level on the active model. An active mesh is the mesh under the cursor when the hotkey is pressed. |
| Delete Highest Level | Shift + Backspace | Deletes the highest subdivision level on the active model. An active model is the model under the cursor when the hotkey is pressed. |
| Set Topological Axis | Ctrl + V | Sets the topological axis for symmetry and layer operations. Two adjacent faces of a model's topological center line must be selected when the hotkey is pressed. |
