Right-click-Options-Configure-Confirm after switching to unnamed CAD configuration-Tools-Workspace-3D modeling-Workspace with switch in the lower right corner-Save the current workspace as (any name)-Right-click-Configure-Switch to cass10/and confirm-drag the position. If you can't drag, right-click any toolbar. If you want to delete the saved file, switch to CAD configuration-switch workspace in the lower right corner-customize-find the file (workspace) below ACAD, delete the saved file, and then make sure to switch to cass 10. 1 configuration.