Re: Beamer not scaling image up

[John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

+++ Joost Kremers [Dec 01 17 21:39 ]:
>
>On Fri, Dec 01 2017, John MACFARLANE wrote:
>>+++ John Muccigrosso [Dec 01 17 07:31 ]:
>>>  On Thursday, November 30, 2017 at 7:05:49 PM UTC-5, John   
>>>MacFarlane
>>>  wrote:
>>>
>>>    I made this change but it doesn't seem to help.  Can you
>>>    test?  I still don't get scaling if I provide just one
>>>    of width or height...
>>>
>>>  This is consistent with your Oct 31 comment, no?
>>
>>Yes.  I thought adding keepaspectratio would allow just
>>specifying one of the dimensions, but it doesn't.
>>
>>Is there any point to adding keepaspectratio, then?
>
>This is what the documentation for the graphics / graphicx packages 
>says about keepaspectratio:
>
>**keepaspectratio** Boolean valued key like ‘clip’. If set to true 
>then specifying both ‘width’ and ‘height’ (or ‘totalheight’) does not 
>distort the figure but scales such that neither of the specified 
>dimensions is _exceeded_.
>
>Note, BTW, that in my experience, providing just width or height will 
>actually scale the image properly, no need for keepaspectratio. 
>Providing *both* width and height will distort the image if their 
>ratio doesn't match the actual image ratio.

This doesn't work with pandoc, because of this line in the
template:

% Scale images if necessary, so that they will not overflow the page
% margins by default, and it is still possible to overwrite the defaults
% using explicit options in \includegraphics[width, height, ...]{}
\setkeys{Gin}{width=\maxwidth,height=\maxheight,keepaspectratio}

If you comment this out, specifying either height or width
by itself works; otherwise, you need to specify both or you
don't get any resizing.

I'm not sure how this works, maybe someone who is familiar
with this part of the template can enlighten us?

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