[OS X TeX] magnification

[juan tolosa]

Hi Ross,
Yes, I printed out the outputs---with and without "\magstep1"---and compared them; they look identical. 

I think I tried \magstep2 as well; I am not sure about \magstep3.  I will try it next time I am at work. 

Also, I will put the \magstep declaration at the very top of the document, just in case (I don't know how else to bypass other pre-defined magnifications,
my ignorance is vast).

What I find baffling is, it works nicely in the Mac (and did work in other PC platforms, such as PC TeX).

Thanks,
              Juan

On Feb 28, 2014, at 8:05 PM, Ross Moore wrote:

> Hello Juan,
> 
> On 01/03/2014, at 11:17 AM, juan tolosa wrote:
> 
>> Hi Herb,
>> 
>> Yes, I am using plain TeX. I have just tried the following minimal example in the PC at work, and the \magstep1 is ignored. I tried the same file in the mac at home, and the \magstep1 works. In the PC I am using Te works within MikTeX 2.9.
> 
> Are you absolutely sure that it does not work?
> The viewer may be rescaling, so you don't detect the difference so easily.
> Test with \magstep3 or similar, where the change should be more pronounced.
> Try printing the output both with and without the \magstep .
> 
> If none of these helps, one clue is that the TeXBook states:
> 
>   "You cannot apply two different magnifications to the same document."
> 
> Furthermore, the \magnification "must be given before the first page 
> of output has been created."
> 
> So if your  plain.fmt  has already specified a \magnification, then a later
> use does nothing.
> I would doubt that MikTeX has done this; but stranger things have happened.
> 
> 
>> 
>> Thank you,
>>                        Juan
>> 
>> %%%%%%%%%%%%%%%%%%%%%%
>> \def\rect#1#2{\leavevmode\vbox{\hrule \hbox{\vrule
>> height#1 \hskip#2 \vrule} \hrule}}
>> \parindent=0pt
>> \def \gradebox{\rightline{\rlap{\quad \rect{0.3in}{0.3in}}}}
>> \def\samepage{\vfill\gradebox\smallskip\hrule height0.5pt\medskip}
>> 
>> \magnification\magstep1
>> 
>> \centerline{\bf Minimal example of ``magstep one.''}
>> 
>> \medskip
>> %________________________________________________________
>> {\bf 1.}
>>            %
>>            % 
>> Prove that the function
>> $$ f(x, y) = {x^2 \over x^2 + y^2} $$
>> has no limit as $(x, y) \to (0,0)$.
>> %
>> Provide a {\it clear and complete argument}.
>> 
>> \samepage
>> %________________________________________________________________
>> 
>> {\bf 2.} 
>>            %
>> Compute $f_{xx} + f_{yy}$ for the function $f$ given by the formula 
>> $$ f(x, y) = {1 \over x^2 + y} . $$
>> %
>> Provide clear, complete, and neat calculations. 
>> 
>> {\vfill\gradebox\eject\end}
>> 
>> \bye
> 
> 
> Certainly this works fine on a Mac.
> 
> Cheers
> 
> 	Ross
> 
> ------------------------------------------------------------------------
> Ross Moore                                       ross.moore at mq.edu.au 
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> Macquarie University                             tel: +61 (0)2 9850 8955
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