To save your work to the given file name, do one of the followings.
1. Selecting File
> Save menu
To save your work to another file name, select File > Save as menu. Give a new file name
and click "Save" button.
To open a saved file, select File > Open menu. Select the folder and filename, and click
"Open" button.
To start a new calculation, do one of the followings.
1. Selecting File
> New menu
Toolbar