To save the contents of a diagram in a file, just carry out the following steps:
Click on the icon in the diagram toolbar. The “Save as” window then appears.
In the “Save as” window, select the physical location where you want to save the diagram, and enter a name and type for the diagram file.
Click on “Save” to confirm.
Note: When saving diagrams in a file, make sure that you type in the file name and the file extension.