I was wondering if it was possible to make an opposite orientation from the back of an indesign document, or do I have to create a backside in a completely different document? Just to clearify. I want the reader to be able to flip the magazine and then be able to read some pages from the 'backside'. I just wondered if InDesign had any tools for this procedure, or should I just separate the two magazines and let the printing company do the orientation calculation? I could also do it manually simply by rotation all the text boxes and images from the back of the document, but it doesn't seem that intuitive.
ID has no special tools for this. You should talk to the printer about what they want, and whether this will be two independent publications bound together (so that you could cut the spine and have two complete docs) or each page will have doc 1 on one side, and doc 2 rotated on the other side.
You could rotate the page view in InDesign, the command is depending on the version somewhere found in a submenu of the page panel's menu.
By itself, rotating the page view is pretty useless since the page order also needs to be reversed for the back-to-front section.