what is there a way to turn the page by 90 degrees?
I know there is a package called lscape, but that only rotates the content of the page, instead of the entire paper.
Basically, I imagine it like this.
So, I want to rotate the entire a4 paper by 90 degrees.

lscapedoes, perhaps you are looking forpdflscapewhich does the same thing at the tex level but gives instructions to the viewer to change the default view of the rotated page. – David Carlisle Apr 02 '16 at 22:21rotatingpackage. But I'm not sure you can then tell the viewer to rotate the page automatically because the page itself remains in portrait - hence the page number in the footer as shown. – cfr Apr 02 '16 at 23:11