Using PDF Create from the Share Menu

Attempted to use the “Create PDF” from the share button but could not get it to work.
My source document was html. After activating the “Create PDF” the display in the window goes full screen - I assume I’m now looking at the pdf document. It would appear that I have two choices to save it. Either use the share button to save the pdf. I tried that and it saved an html version. OR, touch “Done” and get a response to saving the document, again I assume you are saving the pdf document that was just created. Tried that and it appeared that another copy of the html document was saved.

This is probably my error but I don’t see how to save a pdf using the share button.

Any suggestions as to the source of the error?