As I'm not a native English speaker, this document probably has many strange English sentences. So, Please use a comment form to correct any English mistakes etc.
Thank you - Keiji
To save the chart you are editing, use a "File" - "Save" menu item.
If you want to save the chart with other name than current file name, use a "File" - "Save As..." menu item. You will see a file open dialog box to specify the new name.