[O] Beamer mode: specify globally #+ATTR_LATEX:

[ST]

Hello,

I have many images in my presentation. I would like all of them to have
the following:
#+ATTR_LATEX: :width 0.5\hsize

Is there a way to specify this globally (like in the header of the
file), so I don't need to write this before each image?

Thank you very much!