Rearranging model groups in the model group tree Perform these steps to rearrange model groups in the model group tree. To rearrange model groups: In DWD Designer, click the Data Warehouse tab. Expand the data mart. Right-click on any model group node in the data mart and select New Model Group to open the model group wizard. Click Next until you reach step 2. If you have more than one data mart, select the data mart that contains the model groups. Click Next until you reach step 4. Use the buttons on the right margin to add, delete, and rearrange the model group nodes. Note: Individual arrow buttons are active only when the selected node can be moved in the required direction. The left-right indent buttons are active only when indentation is possible. The up-down buttons are active only between nodes on the same level. Click Next and Finish to exit the wizard.