This is the official manual for the latest Org-mode release.
Buffer-wide header arguments may be specified as properties through the use
#+PROPERTY: lines placed anywhere in an Org mode file (see
For example the following would set
silent for every code block in the buffer, ensuring
that all execution took place in the same session, and no results would be
inserted into the buffer.
#+PROPERTY: session *R* #+PROPERTY: results silent