From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rasmus <rasmus@gmx.us>
Subject: Re: Enhancement: Changing default setting of source block header
 line switches [9.0.5 (9.0.5-elpa @
 /home/naehring/.emacs.d/elpa/org-20170210/)]
Date: Thu, 06 Jul 2017 09:03:43 +0200
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Tobias Zawada <i@tn-home.de> writes:

> At first I would like to ask whether it is already possible to change
> the default settings of the source block header line switches.

Couldn't you use #+property headers?
E.g.

    #+PROPERTY: header-args:R  :session *R*

See:

    http://orgmode.org/org.html#Using-header-arguments

Hope it helps,
Rasmus

-- 
I feel emotional landscapes they puzzle me