I found another blog post that showed me to use "/ZoneName:Position" as a placement when I would like to place something of a page in another zone.
I want to place the title into a zone named TitleSection
<Match Type="Page" DisplayType="Detail">
the common_Text field is showing in the TitleSection, so the "/" is doing it's work. Only the TitlePart will not show up in title Section.
I don't have any other placement files than this one. I also tried to do the placement on displayType "Detail", but it's not working for blog posts either.
I have overridden the content-page.cshtml, but I suppose this would not stop my title from being placed into the title zone?