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I need to add a date and time type properties and change it via page details form of web page.
When I add properties in the Pages library, it is not shown in the page details form of web page in the properties list.
Do you have any idea?
Ok, I found out an answer.
Creating custom properties works only with parent web site. Maybe I made an error when I created a subsidiary web site (yes, I forgot to mention it in the question, I hadn't any idea that it was important).
Required, but never shown