Under "my computer" of "publish presentation" , I don't have any "publish format". Only "location" and "output options" are available. Thanks for your help.
You should see the option for HTML 5 between My Computer and Output. I inserted a picture below.
If you cannot see this option, perhaps you're using Adobe Presenter 9?
You were right. I have Presente 9.
Thanks for having opened my eyes!
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