You need to enable them first as you can see here http://take.ms/CXEuWf(enabled for you) and add those fields in your page workflows http://take.ms/tUsZg(added them on your General page's workflows). You need to add them on all categories if you wanted to use them on other categories.
You are most welcome. Glad to hear that your issue has been resolved now.
Just for your information, I have locked and marked this thread as resolved to avoid confusions in the future. Please start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiries.