Drawing a border around the nup=2*2 using handout option

I am begining to use beamer and I finding it very useful.

I have a question.

I followed the user's guide to create a handout of a set
of simple slides that I created. I requested 4 frames per
page (2*2). It worked correctly.

I, however, would like to have a border drawn around the
frames. That is, the handout looks like


      Frame #1   Frame #2

      Frame #3   Frame #4

I would like it to look like

  |------------|-----------|
  |   Frame #1 |  Frame #2 |
  |------------------------|
  |   Frame #3 |  Frame #4 |
  |------------|-----------|

Is there an easy way to do this?

Thank you for your help.

Best regards,

Luis A. Escobar
Louisiana State University


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