How do you save a M/S Excel document to iCloud?

[iMore Question]

When i click the File option there three options:Share, Move to Cloud and Delete. How do you save a M/S Excel document to iCloud?

 

[Just_Me_D]

Although the latest version supposedly allows us to "save to iCloud", I have been unable to find a way to do so. I can, however, view the contents of my iCloud Drive, at least via the Microsoft Word for iOS app, but I can't figure out how to save directly to iCloud as of yet.