Switching

Finally commands to switch the |cm| fonts on; they also set the || dimension temporarily to fit the smaller tips:

( @@==

@@@ @x@@ @@@ @x@@ @@@ @x@@ )

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Figure: Computer Modern <dir>ectionals
\begin{figure*}% \UseComputerModernTips % % % {\let\\ =\cr \tabskip=... ...ert} &\DT{>>\vert} &\DT{\vert<} \\ \crcr}\bigskip }??=[f.cmdir] \end{figure*}

The user can switch the ``computer modern'' versions of the directionals shown in figure ??[f.cmdir] on and off with these declarations:
\begin{defs1} \vert\UseComputerModernTips\vert \cr \vert\NoComputerModernTips\vert \cr \end{defs1}
They are local and thus can be switched on and/or off for individual pictures using the TEX grouping mechanism, ,
\begin{code} \xy*{} \ar @{*{\UseComputerModernTips\dir{<}}% -*{\NoComputerModernTips\dir{>}}} (20,5)*{} \endxy \end{code}
will typeset

$\displaystyle \docode$

regardless of the tip choice in the surrounding text.

( @@=@ @=@ @=@

@@ =@ @=@ @=@ @=@ )

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