To add sheets/models to the currently opened file
- In the
Sheet Browser window, click
Import Sheets & Models
. To display the
Sheet Browser, click
View tab 
Windows drop-down, and select the
Sheet Browser
check box.
- In the Insert From File dialog box, use the Files of Type box to select the appropriate file type, and navigate to the folder where your file is located.
- Select the file, and click Open. All of the sheets/models in the selected files are added to the list in the Sheet Browser window, in the order they were listed in the original file.