Exporting footnotes to Beamer places them too low on the frame

Question

How do I define the space allocated to the footnotes in an Org file that is intended to be exported as a Beamer presentation? The problematic result is shown below:

The relevant bit of Org file looks like this:

#+STARTUP: beamer
#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [bigger]
#+BEAMER_FRAME_LEVEL: 2
#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %4BEAMER_col(Col) %10BEAMER_extra(Extra)

* Role of Org-Babel

** Overview                                                         :B_verse:
   :PROPERTIES:
   :BEAMER_env: verse
   :END:
   =org-babel= is a facility that provides inline code evaluation,
   highlighting and tangling[fn:1: Tangling and untangling is the
   process employed in literate programming for hiding and displaying
   code blocks.].

PS. Of course literate programming.

Answer 1

Add the following option in your header:

#+LaTeX_HEADER:\addtobeamertemplate{footnote}{}{\vspace{2ex}}