Open an existing project
To open an existing project
On the File menu, click Open Project, or press CTRL+O.
In the Open dialog box, browse to the project file you want to open. Project files have a .dzprj extension.
Click the .dzprj file, and then click Open.
You can also open a project from the Recent Projects submenu on the File menu, from the Welcome Screen, or by double-clicking the .dzprj file in Windows Explorer (which will open Deep Zoom Composer if it is not already open).