The Dimensions dialog box appears after you select the Auto-create option in the Design Table PropertyManager and click OK. The SOLIDWORKS software asks you which dimensions you want to add to the design table.
The Dimensions dialog box appears if the model has only one configuration.
To add dimensions to the design table:
In the Dimensions dialog box, select the dimensions you want to add to the design table (hold down Ctrl to select more than one dimension), then click OK.